I've noticed alot a people having youtube issues. My youtube app doesnt work very well at all. But i found a workaround until the issues is fixed. Type in m.youtube.com into your browser and create a shortcut. I can view videos 100% of the time without any problems now. I tried to use the full youtube site but the videos won't play for me. I also tried youtube.com/mobile but i get an error message when i try to load it up. Also any video that u play in m.youtube.com will magically play in your default youtube app. Plus having the shortcut on my home screen makes it seem like its a native app even though it's not. I hopes this helps until their is a real fix to the problem.