YT has been sucking the last few months and just getting worse for me. I wondered if they changed the way vids buffered by default. Seems they only load a few seconds ahead of the playing video instead of just loading the whole video as fast as it can load. If I pause a video to wait for it to load (worked in the past), it won't budge until I hit play again. I was constantly getting stops and starts to the point I just resigned myself to d/ling longer videos with Download Helper and watching them later. I have a pretty constant 23-25mbit connection, so I figured the problem wasn't at my end, but (?).