Hey, by no means an expert Bang player here, but just a few things I think would help your own Bang game.
-I see what you mean by trying to be psychic with those 2Ds. It served you well in those videos, but I'm pretty sure it would have failed against more alert players. Surprised I didn't see you get thrown out of it or just blocked. 2D's an awesome move but if you use it all the time better players will catch on and punish you for it instead of just hitting the guardpoint. Speaking of that, learn the throw break buffer trick, so when people do start throwing you out of it you can be prepared.
-Mixups! Bang has loads of way to mix people up; overheads, IAD crossup with j.4C, hitting low with 2A, whatever you like. I noticed you usually just tried to pull off a psychic 2D, which isn't the greatest thing to do on oki. I prefer to put the fear of Bang's mixups in people before hoping to catch a mistake that lets me get off a 2D.
-Pressure. Try to conserve those nails. Yeah, D Nails are so good and they're great to get in, but I feel they're more useful when you're putting pressure on people. Learn to tk those d nails in the middle of block strings and then dash in to continue pressure. When you do, you can mix up with overheads or lows or command grab. Speaking of command grab...
-Command grab is awesome, but comboing into it is futile. Alert players will just tech it in the huge amount of time they have to do it in. Sure, it can catch people off guard if you do it once, but I wouldn't reccommend doing it much, if it all. That said command grab is freaking awesome. So many people eat command grab on wakeup lol. It's great in pressure strings too.
All that said though, your Bang is pretty solid. Looked to me like your execution was pretty much spot on.