I've been using my AppleTV (3rd generation) to watch YouTube videos for some time, and have been encountering an increasingly frustrating issue. Videos have been taking longer to load than the length of the video itself when this problem occurs.
I watch a lot of segments/clipped shows whose video lengths are around 10 minutes. On a good day the Apple TV keeps a buffer of at least 30 seconds in length out from the position in the video. On a bad day, if I were to let the video load, it would take around 30 minutes to load the 10 minute video.
My network connection is otherwise stable for a myriad of wireless devices (Computers, iPhones, iPads, Game Consoles both plugged into the TV and portable), there is literally no Cat5 cable in my house except for the one linking the Cable Modem to the Time Capsule (purchased in 2009).
And this only seems to affect the YouTube app. Hulu and Netflix take around 3 to 5 seconds to load a video, but afterwards I never encounter any sort of quality reduction or pause for buffering. This YouTube app problem happens on a daily basis, but not consistently. Additionally, the same video does not always exhibit this problem, sometimes switching videos and switching back resolves it, other times I cannot resolve it at all, give up and do something else.
Why is this happening? How can I diagnose the source of this extreme slowness using the YouTube app on my AppleTV?