So I have 3 boxes. When I try to watch YouTube on TV it doesn't always work. Never a problem on the computer.
The satellite boxes seem to always work but the media server box (the most often used) fails 2 out of 3 times and requires a re-boot in order to work. I can no longer use "Fix FIOS issues" as it doesn't work anymore (on any box) but I can do a "reboot STB" and after I do, YouTube almost always works. I do seem to get a lot of "lockups" or "frozen screen" viewing YouTube... it seems to be at random on all boxes.
Also, every once in awhile the media server box loses graphics - no menu of any kind - guide, settings... the only thing I cando is unplug the box.