Nice vid, as you can see all of his JFs are fairly simple and satisfying (Prep BBB:B!). Maybe I'm just retarded but that method for 22/VE B:B doesn't work well for me. Other people are saying that you can mash it out but I find it inconsistent. My method is to enter VE and then wait for the animation to fully complete, where Raph will be standing completely still for a moment. From there, I press B and then B again after a short period of time, not paying attention to the attack animation but instead the duration of time between the B inputs.
Also I wish someone could do a vid for the timing of Prep A stun -> 33K:B. It's frustrating when I Prep A stun someone near the edge and I know that I have the possibility for RO. Heh, the 33K:B after Prep A stun could be considered the hardest of Raph's JFs...