Yes, it would be immensely useful. The reason being our proxy/firewall in the university doesn't allow to stream or download videos. On the other hand, general

Yes, it would be immensely useful. The reason being our proxy/firewall in the university doesn't allow to stream or download videos. On the other hand, generalizing this, making text copies on videos would enable search not only on the metadata of the video, but its content as well. Imagine trying to search for a movie by a particular dialogue you remembered. Other trivial case would to be to generate subtitles for the video, or feeding the output to a language translator enabling me to watch, say an academic video spoken in chinese without available subtitles.