Absolutely, sometimes you want to be engrossed by the film. I imagine it could be useful for a lot of video content, that's a great use case you thought up right there.
Also.
Adding more info to instructional videos?
# KARAOKE
Nostr Karaoke
Tbh I cant stand commentary during films.
But maybe I’d be curious to read or hear e.g. nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s comments while watching/listening to a e.g. tech podcast/interview.
Discussion
Streams could use it to sync the chat with the playback on later viewing.
subtitles for every video could be crowd sourced/AI generated, a nice accessibility feature