Many Apple TV users have reported issues regarding YouTube streaming, with a ‘No content was found’ message appearing when attempting to watch a video. The problem is believed to be especially bad in European countries, as well as Japan and Australia, 9to5Mac reports.
Not all users in the US are having this problem, but for those who do, resetting the device or performing a factory restore to the latest firmware does not seem to solve the problem.
It is unclear exactly what is causing the problem, but some sort of backend issue would apparently be to blame. Apple and YouTube (Google) have yet release statements or formally acknowledge the problem.