I learned of this site from someone here and CANNOT, for the life of me, find it now. It was super simple like “watch.med.ia” or something, and had a dark, minimalistic UI. It had all things ever, basically, and the quality was stellar. No ads.
I’d love to find that site again, please, if anyone knows what I’m referencing.
There are a lot more sites in the megathread, though this is definintly the one that fits your description the most.