I've come across these auto translated videos while traveling, and actually found them quite helpful. Lot of local "authentic" content that I wouldn't have seen otherwise.
I really hate them. Once again, Google have completely failed to consider multi-lingual people. Like Google search, even if you explicitly tell it what languages it should show results in, it's often wrong and only gives results in Russian when searching in Cyrillic, even for words that do not exist in Russian but do in the language defined in the settings.
Also the voice is pretty unemotional and nothing to do with the original voice. And it being a default that you can't even seem to disable...
Its all kinds of annoying if you’re bilingual. Youtube now autotranslates ads served in my mother tongue to English and I have not found a way to turn it off.