Good YouTube workout videos??

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Hey! I've been looking at youtube for some workout videos. Here's some that I've found and liked:

8 Minute Abs
http://www.youtube.com/watch?v=sWjTnBmCHTY&feature=mh_lolz&list=PL8E6515D241BD5333

8 Minute Arms
http://www.youtube.com/watch?v=sSby1UUhyts&feature=view_all&list=PL8E6515D241BD5333&index=1

Working Out Your Butt
http://www.youtube.com/watch?v=N2A6n-zJL9g&feature=view_all&list=PL8E6515D241BD5333&index=2

Fast Fat Burn, High Intensity Cardio Workout - Exercisetv.tv
http://www.youtube.com/watch?v=liHdwZwI1LQ

Have any of you found good, long cardio videos?

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