Let me see…
1. Main complaint; I cannot choose which ones I want and don’t want to see. It’s such a basic, yet the most important feature and in all these years they have actively refused to implement it. Yes, multiple feedback requests have been submitted just by myself and I can’t be the only one.
2. It only downloads at max one a day, even though when I watch something, AppleTV is on for several hours. Why is this a problem? Because…
3. Every tvOS update wipes the downloads clean! It is so insanely stupid. There’s no justifiable reason to do this. It needlessly uses mine & Apple’s bandwidth to redownload everything again and it takes forever because of #1 & 2.
4. There are ancient clips that are still in HD, they look atrocious on a 4K projector. Again, fix #1 and I wouldn’t have to deal with this.
5. At some point, they limited the number of clips that could be downloaded (like 20) or so, which was ridiculous for a 40GB AppleTV that can easily store 40-50 clips. I believe there are now over 60 available and I don’t know if the limit still exists because of #1, 2 & 3. I never even get to a point where I see all of them. On Aerial, I do.
6. Separate clips for SDR and HDR. If you frequently switch between them, it’s a never ending loop of the same repeating clips all the time.
There are clips I loved seeing that I haven’t been able to see in years because of refusal to fix these pretty common sense issues. The screensaver is a headline feature of AppleTV, yet it’s so poorly implemented, I question why they even bothered. You literally have more control over the screensaver by displaying your own photos. Of course, that’s not the same as nice slow-mo videos.