Not sure if you were aware but Youtube now stretches 4:3 videos to 16:9. I haven't checked 16:10 yet but I wouldn't be surprised if those get displayed wrongly too.
I wouldn't know, I don't use their shitty player
Can you link one? 4:3 videos seem normal to me and this seems like it would be a huge fuckup for google
>>56128765
https://www.youtube.com/watch?v=AmQHas4NFjg