I have my history off and it punishes me for that, saying it can't recommend me anything because I won't share my history with it, even though it has my likes on videos. furthermore, if you browse in incognito, it does suggest videos to you, so clearly, it's a retaliation. I have my history off, so out does recommend to me random stuff, like if I was a newbie. Such a silly system.
But as I always say, terrible products are usually because the developers/engineers themselves are not still using it, or what, they wouldn't stand for it and change it.