It got rolled out due to how MASSIVE the bounce rate is if the video is in a language users don't understand. I can easily see this on average providing a better experience and lead to less people bouncing. The false positives are not enough to counteract it.
Just feels relatively easy to change the language preference to be a multiselect though.... like ignoring user backlash, I'd assume _internal users of YT_ would just get extremely annoyed.
I don't really need magic, mainly want "if language not user's language" to turn into "if language not in user's language(s)"
