Here it is
I just tell it like it is, and I don't pull punches.
1) You have too much weight on your front leg starting out. This is counter productive for a breaking technique. You shold have 60% of your weight on your back leg, and 40% on your front leg. Then as you break your weight shift from the back leg to the front leg as you make contact with the cue ball. (and get your hips into the break). Your legs and hips is what can generate a lot of power into the break, not your arms.
I am 5'7", and my breaks were timed in Vegas at 26,28, and 31.
2) You start to stand up before you deliver the final swing, on the backswing actually. Stay down, and rise forward as you make contact with the cue ball. I noticed you grip the cue with a full fist, but loosen the back fingers on the backswing.
3) I am not a pu**y, you have about the right speed. Nothing I hate more than slowing down the break a little and 3 balls remain on the table just a couple of inches from a corner pocket. Making a ball on the break can mean the difference between winning and losing.
I hope this helps some, I wish I could just work with you in person some, because I think I could put you into a good technique and break within 20 minutes or so. The best article I have seen on breaking was an article in Billiards Digest about Django's break. You might email them, and see if you can get a copy of the article. It was a full fledged article, and was real good.