same as to the french (and me) canadian french sounds uneducated. same as canadian english sounds bad, eh?
the other languages you list, outside of your cherrypicked examples, are very different. how do i know? with ukrainian and belorussian, i can just have a coversation in the language. i take a russian word and i say it with a ukrainian accent -they understand me, and i fully understand them. in the ones you list, it's not canadian french vs france french. it's like spanish vs french. i can kinda understand the general idea of what they're saying, if i focus. they sound foreign -like when i hear spanish, only knowing french.
it's southern china vs redneck north china mandarin. your examples are mandarin vs cantonese.
and while most of ukraine and belarus don't even speak their own language, when they do it's not clean. they speak суржик, which is a mix of russian and their language. so it literally is bastardised russian.
and btw, i lived in kiev for almost 2 years, and have visited every country in europe. i really do know what i'm talking about 1st hand. so i didn't watch your youtube video. it would be like you posting a link explaining why water is dry.