The ability to add an extended audio description (the one with pauses that adds time to the original video) to a video would be great; not as a separate video, but as a toggle, like captions.

Right now, you can only add concurrent audio description as an mp3 track, but the limitation is that the audio described mp3 has to be the exact length of the original video. What would be helpful is if you could upload the MP4 of the extended audio description, and when audio description is toggled on, the video swaps to that extended audio described MP4. This is a better solution than having a separate videos - one original and one audio described - because having both of those back-to-back on a Canvas page is confusing, clunky, and it doesn't provide parity in access.

For reference, streaming platforms like Netlfix have this feature integrated onto their videos. You aren't searching up a separate video to get the extended audio description, it's a toggle on the original video.