Did you know about the automatic captioning facility on YouTube?
This is described on the YouTube help pages as follows:
Even if you haven’t added captions to your video, YouTube may use speech recognition technology to automatically make captions available.
Since these are automatically generated, the quality of the captions may vary from video to video. As the video owner, you can always edit the captions to improve accuracy, or remove them from your video if you do not want them to be available for your viewers.
Here’s an example from the recent ocTEL webinar on assessment and feedback. (Click on the image to see the detail of the captions.)
Feedback: The automatic speech recognition requires more work.