Yes, overtime you’ll get more ads, as the server cost increases. But you’re not watching 360p content on a 1024*1024 monitor any more.

There are more and more content creators, creating 4K content every day. Server costs goes up.

IF you don’t like ads, you have the option to buy premium, to pay the server costs / content creators / staff.

It’s not enshitification, since you get more, high-quality (figuratively and literally) entertainment / whatever.