I often load youtube, choose a few videos to add to Watch Later and refresh the page. Most of the times, 3 out of the 5 videos shown stay there when I refresh.

I have to lower the scale to see more videos in the homescreen and even then, they reverted that change; so now I'm stuck with 3 videos instead of the 8 that used to appear. Add that to the refresh problem, and youtube feels unresponsive.