What is this? And any cool simple-ish slack/whip tutorials?

What is this move? I see it a lot and don’t know a name for it. Are there any tutorials? The trick appears at 0:13 and a bunch of other places.

http://m.youtube.com/index?&desktop_uri=%2F#/watch?v=1_5ml6WYi4s

Also, does anyone know any tutorials for cool and not extremely complicated lacerations/whips/slacks? Like the one Tatsuya Fujisaka does to get in an almost Triple or Nothing type mount in his 2011 Japan Nationals freestyle. Or anything that could be put into combos or looks smooth.

I can’t get the link to work. Maybe just me?

Nope, doesn’t work for me either.

First step of yuuki slack. Its really easy

Already know it.

The video is Cleveland Sessions 5. I’ll try to get the link to work, though.