YouTube's video playback problems might have nothing to do with the web. Despite having an iPad app that is otherwise mostly great, their iPad video player itself is abysmal. It's just flat-out broken, and they're presumably not going to fix it. If you start playing a video, the timeline at the bottom will start turning grey from left to right to indicate the part of the video that is buffered. But if you scrub to a position in the timeline that is buffered, the video player will spin for a rather long time, and sometimes just spin forever until you scrub to a new spot or manually change the video quality. Bizarrely, if you scrub to a position in the timeline beyond the buffer, the video will load nearly instantly like one would expect. Somehow the buffered video loads slowly, while unbuffered video loads quickly. It's a huge bug, it's been in the iPad app for as long as I can remember.
That happens frequently on the desktop website YouTube too. It also happens on my Android phone using the native app.
Related to that, if you try to scrub to a position BEFORE what you are watching right now (say, 1 minute before), which is obviously buffered since you have just watched it, it goes full loading-retard again. It's like it just throws away the data it buffered and showed you. It is insanely infuriating.
Yes, that is my workaround as well. I also sometimes use the jailbreak utility VideoPane to extract the iOS-native video from the YouTube app and play it in a popup. You get the native video player and controls, and funny enough, it works wonderfully.
