I’m A YouTube Premium subscriber, and I’ve been noticing this delay on my TV for a few days now - a very noticeable, long pause when opening the home screen until the thumbnails are loaded. I’ll explicitly check other places too now, I’m not sure if it’s also happening in Firefox for me.

Bit late but YT premium is a waste of money. You’re paying YT to not show you ads and YT gets paid to show ads.

For the background music (that was originally freely available for all, btw!) and download function there are heaps of foss apps, anyways.