I love that a third party is stepping up here, but it's incomprehensible to me that Google doesn't do this themselves. They're a search company, and they own YouTube. The YouTube data — including the subtitle files — is already sitting there
on their servers; they don't have to scrape it, they just have to index it. What are they even doing?
Fun thing to try: do a Google search with "site:youtube.com" in it. You get basically nothing, no matter what keywords you use. It seems that Google actually entirely ignores/excludes YouTube from their regular HTML indexing, and instead only relies on the YouTube backend to actively push content into (a special, separate part of) the search index. Which gets you "results from YouTube" and "video search" — but doesn't get you the ability to search youtube videos pages qua web pages. (Consider: you can find a post in a Reddit comment thread on Google. Can you find a post in a YouTube video comments section on Google?)
Heck, when I first heard about YouTube's autogenerated captions, my first thought was "oh, so this is Google building deep indexing of video through audio transcription, because they can't trust externally-provided subtitles, right?" But it's been 10 years, and I couldn't have been more wrong.
Fun thing to try: do a Google search with "site:youtube.com" in it. You get basically nothing, no matter what keywords you use. It seems that Google actually entirely ignores/excludes YouTube from their regular HTML indexing, and instead only relies on the YouTube backend to actively push content into (a special, separate part of) the search index. Which gets you "results from YouTube" and "video search" — but doesn't get you the ability to search youtube videos pages qua web pages. (Consider: you can find a post in a Reddit comment thread on Google. Can you find a post in a YouTube video comments section on Google?)
Heck, when I first heard about YouTube's autogenerated captions, my first thought was "oh, so this is Google building deep indexing of video through audio transcription, because they can't trust externally-provided subtitles, right?" But it's been 10 years, and I couldn't have been more wrong.