xKppjxTwpF0
ginpmeCJvPQ
kx60MBH79pw
for a high quality video, u can put a code at the end of the video id at youtube website
code : &fmt=18
example:
http://www.youtube.com/watch?v=kx60MBH79pw
to
http://www.youtube.com/watch?v=kx60MBH79pw&fmt=18
thats all.. :)