First off, that one chick (the heckler) needs a dropkick to the forehead. lol just kidding
Your arms seemed to flail all over the place when you did the sleights, but they don't need to! It looks like you can do the sleights fairly well, I would just minimize arm flailage (new word? lol)
Also, I would recommend developing a routine that leads up to the ball vanishing and reappearing into their hands. It seemed like you just made it disappear/reappear in their hands over and over until the final load of all the sponge balls. I like to do the vanish in my left hand and then make the ball appear with the other in my right hand first (maybe a few times) When you do that, it is amazing but they can still be somewhat skeptical. THEN, when you make it appear in their hand - BIG reactions! You lead up to that big climax and give it that suspense and that alone can have a huge impact on your reactions.
There is one last thing I would like to point out - your vanish. You seemed to just pop your hand open and it is empty. There is no suspense or anything like that. Once both sponge balls are in their hands (they don't know that) and (they think) one sponge ball is in your hand, dude, you are SOOOOOOO far ahead it's unreal!!! Take advantage of that and milk that vanish for all it's worth. Squeeze your hand do whatever to really make it seem like that sponge is dematerializing and vanishing!
Overall, I think you got the sleights down! You got awesome reactions and everyone loves live magic videos like this! I think it was great but it could have been better! Keep practicing man! I look forward to possibly seeing more video's like this!