I think this is the big issue. Subtitling video is much more difficult than just recording it and while maybe reasonable for well funded groups, it isn't for yo

I think this is the big issue. Subtitling video is much more difficult than just recording it and while maybe reasonable for well funded groups, it isn't for your average one person shop. In these cases, it seems like it would be much more reasonable to allow scripts/transcripts in place of subtitles. Putting together a written version is something that many educators do already.