LR has to have access to subtitles to work. So, if the YouTuber didn’t upload subs and/or mark the subbing language correctly (for auto-generated subs on YouTube to kick in for LR to grab and display).
Unless it’s Netflix ASR, LR can only display what’s already there (accept for the machine translation line they are capable of doing/displaying as the second set of subs).
There is no ASR for YouTube yet, so it would have to have some type of subs available to work.
I think the Rooster Youtube Tools for LingQ might be able to help in this case — if a single type of subs exist.
I used it on a YouTube video missing Korean subs the other day and it was able to give them to me because the video had at least a single type of subtitles/CCs.