Yes, I agree with Cardza. If you comment the obivous it just make the whole suspicious. If you do card magic, you never do a D/L and say: "look here is only one card, the ace of spades...". Even if what you say is true (which is the case in your trick) it will rise unnecessary doubts about it. Maybe try a line like "obivously it can't go trough the sides or the middle", as you do the moves that correspond to your words. Simplicity makes it effective.
What comes to the working, try to make the moves a bit more smoother (just practice more). Show that the rubber bands are trapped, once, it's convincing enough. You don't have to show it from 10 different angles

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And the most important comment from my side. The finale. Instead of pulling the rubberbands apart with a fast motion like in the vid. Build a climax. Make small circular motions as you SLOWLY move the rubber bands apart and make it look like you are totally focusing with your mind on the rubberbands as you keep blowing (with less power than in the vid) on the bands. Now when you do it slowly and if your spectators are close to you (closer then the camera in the trick) you can try this: When blowing, twist your right hand 90 degrees horisontally clockwise (so the the back of the hand is facing you) so that only the other string (of the right r-band) has moved apart from the "bunch". And keep blowing on the band and moving your right hand to the right so that the other string too gets released from the "bunch" and the rubberbands sepparate. Cover up the fact that the rubberbands are already separated with small circular motions.
I hope you get my weird explanation but what I'm trying to say is that it's probably more powerful if you present the ending slowly making it look like magic. Instead of pulling them fast appart making it look like a trick.
Anyways, nice work and I enjoyed the video. And even though I'm giving you alot of criticism I don't handle the sleight nearly as good as you do. Just gave some ideas on the presentation.