With UTV Clicksilver ........don't know speed...........
You could check your speed at www.speedtest.net.
That's what I normally do too. Start it playing then pause until it downloads/buffers the lot and then restart for a smooth play. I get the buffering problem even on very high speed links so presumably at least some of the delay is at the YouTube server end?Best solution just stop or pause the video and let it download fully then play it.