I have to say, most of you critizing him are being complete @ssholes in the way you're doing it. And no, it's not that you're not being nice, I don't care if you're telling him his video sucks, it's that you're being way too dickish in the way you say it. Honestly? I didn't even notice the crotch shots untill someone pointed them out, because I was watching what I was supposed to be watching. And for christ's sake, it's not even that big of a deal. It's not part of what he's trying to get criticism for, so shut up about it. It's supposed to be constructive, and a lot of the comments I've seen are the opposite.
But to comment on your videos, I think pretty much everone has said everything. The erdnase change shouldn't have the entire card covered, your breaks were kinda obvious, and you were very stiff and unatural looking in the color swap vid. Also, you should work on your double lift a bit, when you pull the card out, you should try to grab it more from the center, which would make it more natural. When you do the Shake/Twirl change, you shouldn't make such a drastic movement; also, I'm not saying you're doing it wrong, but I grab from the pips when I do a shapeshifter/Twirl... not really sure if there's a right way, I just find that way easier.
Anyway, good start to it, just refine things a bit to make it realy nice.