UCL mediacentral


Frequently Asked Questions and more

Here is a list of frequently asked questions on a few ideas on how you can use Mediacentral
How do I find my video after uploading

There is a bug in the system which we are currently investigating, normally you can see your media files once encoded by visiting the Mediacentral home page and clicking on My Account > My Content, and clicking on Yes in the "Encoded" field. This feature has stopped working and you will get a message Invalid URL.

The simple solution is to actually check your Outlook inbox and find the email from Mediacentral, this contains the link to your video and by following this you can get the Share or Embed code.

I cannot access, upload or play certain videos since the Mediacentral move to the Cloud

Mediacentral has now moved to the Cloud, however, some people may be experiencing or having trouble playing, uploading or accessing content.

One major change since the move to the Cloud, is that Mediacentral now requires you to login using Single-Sign On or SSO, to access your account. Before this can take effect, it is important that you:

Sign-out of all your UCL accounts and web applications from your web browsers e.g., from Google Chrome, Firefox, Safari, Microsoft Edge. Please check all your different devices e.g. desktop computer, laptop, tablet smartphone etc., and sign-out of your UCL web applications there too.


If problems still persist, please contact the Mediacentral team.

  • Open browser and clear cache and browser history.

A tip for ensuring you are signed-out of your UCL web applications, is to:

Completely close and quit your web browsers including any open tabs.
I get an Error Code 232011 or 224003 notification when I play a video? 

We note these errors only seem to happen with Apple devices. If you see an error code displayed when trying to playback video such as 232011 or 224003 error, then in the first instance:

  • Please check that you have the most up to date version of all of your web browsers.
  • It is important to update browsers regularly, primarily for security purposes.
  • Once you have updated your browser, it is good practice to restart your device to ensure any old settings are deleted.

If the problem persists:

For users who prefer Chrome for Mac, we have created a workaround:


  • SSL certificates on UCL websites were revoked due a security update , but we have discovered that Chrome for Mac is still referring to an old revoked SSL certificate.


  • We have created a document which outlines the steps which are required to manually update the SSL certificate, please contact the Mediacentral team to access the information.
  • Simply read the document and download the attached .crt file
  • Double click on the file and it should automatically open Keychain for Mac and update the certificate.
  • Close and reopen Google Chrome for Mac

If you need additional assistance, please contact the Mediacentral team.

Will my videos play in countries that block YouTube and Vimeo content?

Yes, Mediacentral does work in countries that block mainly Google-hosted content. However, this should be caveated by saying the video viewing experience will be dictated primarily by a viewer's broadband speed (bandwidth) which can vary and that some people viewing may not have the best of experiences. Also, it is important to note that the services delivered are at the behest of any new firewall rules brought in by any national government in the future.

For assistance to those students who are currently based in mainland China who need access to educational resources which support their learning activities UCL has created the China Connect service, full information on the China Connect service is on the website https://www.ucl.ac.uk/isd/services/get-connected/china-connect

I'm leaving UCL but wish to transfer ownership of my media to one of my colleagues?

We are working on a simpler solution that will allow media to be transferred to another user/staff member.

However, currently 

  • Only media files that are in the category Public Access can be transferred to another staff member.
  • Before you finally leave, it is important that you contact the Mediacentral team for assistance in transferring the ownership of your media files if they are in use on a Moodle module. The team will discuss the options to allow you to make the best decision for another staff member to mage and own access to this media content. 
  • Ideally, before leaving you should at a minimum move any content that is Personal (Private) or Personal (Public) to a category, if your team, department or faculty have previously requested a category, then the media can be reassigned to that. Alternatively choose if appropriate the category - Public Access, this will ensure any videos which are embedded in Drupal or other systems continue to play. You should note that if another individual within your team or department takes ultimate ownership of your media, you should take time to consider any implications, regarding copyright, GDPR and similar permissions.
  • Media content that is not viewed once you have left UCL will be removed from the system at the end of following the academic year.

    Please request a change of ownership for content that is in use and may be required in the foreseeable future.
Why is the sound muted when I play a video

For Desktop@UCL and PC Users

Google Chrome

  • Click on three dots on top right-hand corner
  • Click on Settings
  • Then click on Privacy and Security
  • Then choose Site Settings
  • Then scroll down until you see Sound
  • Then ensure that the slider is on to Allow sites to play sound (recommended)

Internet Explorer

  • Click on the Cog in the top right-hand corner of your browser window
  • Choose Internet Options
  • Then click on the Advanced tab
  • Scroll down and ensure under Multimedia that the Play sounds in webpages option is ticked.


  • Click on the three lines in the top right of the screen
  • Select Options Select Privacy and Security (left-hand side of the page)
  • Scroll down and ensure that the check box Block websites from automatically playing sound is unticked.

Apple Mac users


If there is no sound when playing a video in Safari:

  • Then in the menu bar choose SafariPreferences
  • In the Safari Preferences menu bar select Websites
  • Then select Auto-Play in the sidebar mediacentral.ucl.ac.uk should show under Currently Open Websites
  • Or if you have visited before under Configured Websites
  • Choose Allow All Auto-Play in the drop-down box to allow sound to play automatically.

For Google Chrome and Firefox please follow the instructions for a PC

What is the retention period for Mediacentral content?

 Mediacentral should not be used as a data storage facility, users should use either their N, S or OneDrive for long term storage

For information about the policy

Information can be found here https://www.ucl.ac.uk/mediacentral/terms-use/retention-policy

Can videos hosted on UCL Mediacentral be embedded on Wordpress?

Yes, we have recently received confirmation from a UCL department that Mediacentral videos can be embedded into a WordPress site. This is done using the Mediacentral Embed link rather than the Share link. Contact the team for further assistance.

How do I add captions to my video?

This is an activity that is done in the upload process, or if you like can be done at a later stage, note that after 23rd September 2020 with respect to accessibility you have to have added your captions file within 14 days of upload. in Mediacentral please use either a .srt or .vtt or .dfxp file format.

Depending on where you get your captions, you can always edit these within Mediacentral - further information to follow.

Where do I get information on how to create a subtitle file?

The Mediacentral team added a 'charged for' captioning service in summer 2020, please contact captions at ucl.ac.uk, the rates are significantly lower than using external services and we can offer these in various languages.

There is a UCL document on subtitling best practices found here and a useful blog entry here.

How can I create a transcript file and add this to my content in Mediacentral?

There are free online tools to help you convert your captions file to a transcript.

A simple solution is to use Notepad or TextEdit to open your .srt or .vtt file, copy the text and paste into the text box here, then copy the results and paste into a Word (or similar) document, once you have completed this process you can then add to your Attachments in Mediacentral to share.

I can see a Record Screen icon, how do I record using Mediacentral?

We now have the  MEDIALecture tool, this is a component of Mediacentral and was trialed during the initial Covid-19 lockdown, due to its success UCL staff & students can now record their screen, their webcam, and their voice or all three whilst at home. For further information go to the MEDIALecture pages

Can I upload multiple media files?

Currently, each file you have has to be uploaded individually, however, please contact the team for information on how we can assist with uploading a large number of files.

      How do I add a PowerPoint or Word document file?

      If you wish to add a file that links to your content then it is possible to add 3 attachments, these can be in the file formats .doc, .docx, .gif, .htm, .jpg, .mp3, .pdf, .ppt, .pptx, .swf, .txt, .xls, .xlsx, .zip

      You can do this at the upload stage or if you wish to add at a later date just find your file in My Content and click on the Pencil icon to initiate the process, just click Next until you see the Assoc Files tab and then Browse and add your file. Once your file has uploaded click Next and then Finish. You do not need to wait for any encode process, your file will be there immediately.

      Can I upload and view media when using a mobile device?

      Currently, you can only upload via Apple iOS. To upload from an iOS device, you must be logged onto the site with an account that has upload permission for at least one category.

      On an iOS device

      • Click the Upload button at the bottom of the screen.
      • On the next screen choose a file to upload by click Browse.
      • You can upload an existing video or use the device camera to shoot a new clip. Video with audio and video-only uploads are allowed.
      • Once the clip has been uploaded click Next and provide the details for the clip. The Title, Category, Description, and Email fields are mandatory.
      • Add tags to the clip to help viewers find the clip through search criteria. If there is a disclaimer check the box to agree to it.
      • Click Next.
      • On the confirmation page, click Finish to complete the upload process.
      Enable sharing your content with a 'Creative Commons' licence?

      Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0)

      It is best to use the Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) licence. This will let others copy, distribute, display and perform only original copies of your work. If they want to modify your work, they must get your permission first.

      You are free to:

      Share - copy and redistribute the material in any medium or format for any purpose, even commercially.

      The licensor cannot revoke these freedoms as long as you follow the license terms.

      Under the following terms:

      Attribution -You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your us

      NoDerivatives - If you remix, transform, or build upon the material, you may not distribute the modified material.

      No additional restrictions - You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.


      You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation. No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.

      Can I add a watermark or overlay to my video?

      Prior to uploading to Mediacentral if you wish to add a watermark or overlay to brand your video then a simple solution is to download and use the free software VLC Media Player. Information on how to add your logo/watermark/overlay can be found here.

      How do I download a file for offline viewing?

      You can download video and audio files by right-clicking on the Download link in the information under the video on the Mediacentral site.

      • You should note that not all content has been made available for download.
      • If you need a copy of a file that is not available for download then we suggest that you note the name of the Contributor and email them with a request stating the purpose and why you would like a copy of their file.
      Using Playlists

      Playlists are created with the application, currently, they are also only available to view within Mediacentral. 

      You can view and manage your Mediacentral playlists by clicking the My Account button at the top of the screen after you have logged in.

      Creating a Playlist

      • Click New to create a playlist. In the pop-up window, give the playlist a name and a description.
      • The Private checkbox is checked by default.
      • Uncheck it to make the playlist available to other Mediacentral users.
      • Click Save to save the playlist.
      • You can then add content to the playlist.

      Reordering Playlist Content

      Once you have added content to a playlist, you can reorder the clips within the playlist

      • Go to my My Account
      • Click Playlists, and select the playlist by name, searching for it if necessary.
      • The playlist displays the list of clips.
      • Hover over a clip, then click and hold the four-way arrow, dragging the clip to a new position in the playlist.
      How do I manage my media?

      Once you have uploaded content to Mediacentral, you can manage this by clicking the My Account button at the top of the screen after you have logged in.

      Content List

      Your content page displays information about the media you have uploaded. In the content list, you can search for content, modify settings, and delete items. In the media listing area, content is organised according to the most recent contributions.

      Click any of the green column headings to organise your media differently.

      Searching for media

      In the Content Manager area at the top of the content listing page, you can search for media items by specifying certain criteria:

      • Keywords: Keywords return content that contains these words in the title, description or tags.
      • Category:  Selecting a category returns only the content from that category in the search results.
      I want to delete a media file, is this possible?

      Deleting your media is quite simple, but before you do this ensure that you have a copy of your file offline, if you are not sure then download your file before deleting.

      To delete a file, first login to Mediacentral and then:

      • Under My Account select My Content to see your files.
      • If you have a large quantity then use the Search function to find the file you wish to delete.
      • Then tick the radio button on the left-hand side of the camera icon and at the bottom of the page.
      • You will see the text Delete selected media and a tick box to include deleting any associated files.
      • Before clicking on the Delete selected media, double-check that you have only chosen the files you no longer require as this action cannot be reversed.

      Support for Learning and Teaching and using the Moodle Media Resource

      FAQ's when using the Moodle Media Resource

      It has been advised by UCL Digital Education that media files that are part of a taught module should be uploaded through the Lecturecast system, which connects these files to a Moodle module, especially where these are lectures. Information on adding content to a class can be found here: https://wiki.ucl.ac.uk/display/LecturecastResourceCentre/Add+Content+to+a+Class

      Existing Mediacentral content which is in a Personal, Public, or departmental category should be added to Moodle by using the embed code seen by clicking on the share icon on the top right or your video.

      The system still allows you to use the Moodle Media Resource if that is considered a more appropriate method of distributing media to students. See https://www.ucl.ac.uk/mediacentral/moodle for help

      Do I use the Mediacentral portal or Moodle to upload and view my videos?

      If you wish to share your video with the world, then adding the content directly through the Mediacentral portal is the best method. However, if you just want students on a particular module to view the content then please use the Lecturecast direct upload to your Module.

      Can I upload multiple files?

      If you have a significant number of video or audio files that you wish to add to Mediacentral or your Moodle course, please contact the UCL Mediacentral team for further help and information.

      What media file formats can I upload?

      When uploading media files, please check your media is one of the approved file types. These currently are: .avi, .flv, .mkv, .mov, .mpg, .mpeg, .mp3, .mp4, .wav, .webm, .wma, .3gp.

      Who do I contact for further information on using Lecturecast for uploads?

      You can contact the ISD Service Desk or email the UCL Digital Education support team for help and information.

      How can I choose my own thumbnail image?

      During the upload process, it is possible to choose your own thumbnail image. This can be an image that better reflects your media content, instead of the thumbnails that are automatically generated by the system.

      • When uploading and you arrive at or select the section marked Thumbnails
      • Next, choose the button marked Browse
      • This will then take you to a file chooser where you can select the image of your choice.
      • Once selected, this will become the new thumbnail image.

      It is recommended that the image you choose has:

      • a JPG or PNG image file format a minimum image size of 640 x 360 - (Width x Height)
      • a maximum file size of 1 MB
      How long will my file take to upload?

      This depends on the size of your file, its best to only upload files that are 1080p as few PC monitors display 4k video.

      Processing time - my file is still not available?

      Unfortunately, we do not have the same processing power as YouTube and all files go into a queue - please be patient, the transcoding of your file is on a 'first-come, first-served basis and at peak times you should always allow 4 to 8 hours to guarantee your file has been fully processed and available.

      Why can't I see the content I've previously uploaded into Mediacentral?

      The Mediacentral portal is the interface for publicly available content and although all media sits on the same servers, the security and access for Moodle content is kept separate for obvious academic reasons.

      Unsuccessful uploads - what happens, what do I do etc.?

      If your file fails to upload you will receive an email letting you know there is an issue. The support team also receives this and we will look to ascertain if the problem is a system error or a problem with the file. Normally the issue is due to poor connectivity, UCL's infrastructure is more stable, so it is always best practice to upload when on campus. If you are working from home try and use an ethernet connection if possible.

      Also, check that the format of the file you have uploaded is on the list of approved filetypes and is under 5Gb in size.

      My Media has failed to load or play?

      On rare occasions your media may not play, the main reason is normally that your browser probably requires updating, or is set to play via Adobe Flash and this is now blocked for the majority of browsers. All content in Mediacentral is set to play in HTML5, and will ONLY fall back to Flash if your browser is not HTML5 compliant.

      If your content will not play using Desktop@UCL then please contact the Mediacentral team.

      Editing, is this possible?

      Editing of your video content is now possible using the Trim, Chop, and Export function in Mediacentral further information is on the general upload pages of the website, if your project is more substantial please contact the UCL Educational Media team.

      Can I upload & view from mobile devices?

      Yes, this is possible, but generally not advisable if you are on the move. Try to do this where you have good access to WiFi rather than using your data allowance. To view login to UCL Moodle as you would do normally.

      Can I update a media resource added by another tutor?

      Yes, you can do this. However, only do this if you have a good reason to and you also have equal authentication rights as an instructor.

      How does a student upload media?

      This feature will be implemented in the summer 2020. If as a student you currently wish to add a video or audio file to your UCL Moodle module then use the UCL Mediacentral portal. Follow the process to upload as described here and make the content Personal(Public) to you. It is possible then to share or embed the content but your video will not show up in the portal.

      Once your file is available, always use the UCL Mediacentral Share link to add to Moodle.

      How do I delete media I no longer require?

      If you wish to delete any media assets uploaded using the Moodle "Media Resource", then please contact the Mediacentral support team.