Huh? I am an iOS developer and I’m certainly not aware of any technical restrictions here. The YouTube app overlays all kinds of things over full screen video.

Huh? I am an iOS developer and I’m certainly not aware of any technical restrictions here. The YouTube app overlays all kinds of things over full screen video. Link boxes while ads play, for example. This was more about suitability for the screen format - multiple boxes with small text just didn’t work too well on mobile.