Interesting. I guess we can experiment with how many bits can be compressed to a video frame. Is there a guarantee that YT doesn't change the frame rate?
Another idea is YT as code repo: essentially one makes a movie that shows code files. On retrieval, OCR can be applied to transform the movie back to code in text.
I know that YouTube used to support only up to 30fps video, but IIRC they now support 60fps. This became a thing because people making videos of themselves playing the newest generation of consoles (PS4 / XBOne) want to upload in high quality, and the consoles now do 1080p at 60fps.
If this is a concern for people (recording at 60fps to upload for 60fps), I doubt that Google would downgrade the framerate except for maybe the lower quality versions of the video (does 60fps really matter for 240p video?).
Another idea is YT as code repo: essentially one makes a movie that shows code files. On retrieval, OCR can be applied to transform the movie back to code in text.