Moderators can record their sessions and share them. The recordings are saved as MP4 files. Users can stream or download them to view them. Recordings capture the audio, video, and any content that is shared during a session. Recordings also capture any real time captions or subtitles available during the session. If there are more than one caption available during the session, the recording captures only the first one.

More on recordings for moderators

Recording content

Collaborate Recording Content

Recorded sessions are saved as MP4s. Recordings include activity in the live session.

  • Audio
  • Any content shared or active speaker video. If both are shared during the session, only the content shared is recorded.
  • Captions entered during the live session or added later by a moderator. Only one caption track is available. If your session had more than one caption track, only the first available one is captured.
  • Chat messages in the Everyone channel. Private messages and chat messages in breakout groups are not recorded.

Only moderators can turn recording on in sessions.

Everyone can view the recordings from any device as often as they want. There are no view limits.

Recordings need to be converted into a playable format before viewing. The first time a recording is accessed the conversion begins. It may take a few minutes but once is has been done the recording can be viewed by everybody.

Add Captions to Your Collaborate Recordings

Add captions to your recordings

If you used live closed captioning in your session, there are captions with your recording already!

Add captions to your videos to engage all learners. Captioning video creates accessible content for individuals who are deaf or hearing impaired. Captions can help all students consume the video content. The uses for captions are limitless.


  • Anyone working in a noisy environment can read captions.
  • Non-native speakers can read captions in their own language.
  • Students learning to read can follow along with the speaker.
  • Students can see the spelling of terms that will be on a test.
  • Anyone can search the session for key terms.

You can upload Video Text Tracks (VTT) caption and SubRip Subtitle (SRT) files to add or replace captions in recordings.

To learn more about VTT caption files, visit W3C WebVTT and Mozilla WebVTT.

To learn more about SRT files, visit the SubRip topic on Wikipedia and How to Create an SRT File by 3Play Media.

  1. From Collaborate scheduler, select Recordings and find the recording you want.

    The Collaborate Scheduler is available in Blackboard Learn and LTI compliant LMS courses. The Collaborate Scheduler is not available in the Blackboard Open LMS Collaborate activity module.

  2. Select the Recording options menu, and select Add caption source.
  3. Browse for the VTT file and upload it.

Overwrite captions

Recordings with captions have a Closed caption options menu. Open that menu if you want to overwrite the captions.

  1. From Recordings, find the recording you want.
  2. Select the Closed captions options menu, and select Overwrite caption source.
  3. Browse for the VTT file and upload it.

Auto-generate captions

Auto-generating captions is available through our seamless integration with 3PlayMedia. You must have a 3PlayMedia license and account to use this feature. We set up the integration for you. If you want the integration, submit a case on Behind the Blackboard (available in English only).

Learn more about 3PlayMedia on their website

Use the Recording options to auto-generate captions.

  1. Open the Recordings page in Collaborate Scheduler.
  2. Find the recording and open the Recording options.
  3. Select Auto-generate captions.

The generated captions will be available to anybody who has access to the recording.