Youtube DL does it as well. Not sure how but it works around some regional issues.
I don't even watch youtube directly any more thanks to that. Straight down with youtube-dl and into VLC. I'm working on a wrapper in Go slowly that manages subscriptions, auto downloads them and then adds a task to my todo list to watch them. Fuck sitting through ads - the creators all have sponsors and placement now so Youtube is just an inconvenient barrier to content.