Np.
Don't agree with the statement that this allows them to sit up. Ive never had someone be able to sit up in that situation, and I'm a 165 lbs guy who grapples primarily 180+ guys. Besides, I also believe in bending the arm so his thumb points down to his feet and hipping into it at an angle, so he can sit up all he wants. This also prevents spinning out squirreliness, and incidentally comes off the Bas Rutten DvD's.
So that piece of info is good at least
Bas shows a few ways of getting out of the triangle on his new dvd's, all of which are pretty basic solid techniques. Perhaps the video you saw was old stuff, but the new dvds clearly were collaborated on with people who knew more about grappling then Bas.