-Your initial jump is enormous. The more force you put into the ground like that, the more you need to redirect. Try a short quick step where you don't jump as high.
-Your arms are pretty much throwing down. You have to thrust them out in sequence with your jump. If you are familiar with dive rolls, that's that visualization I give everybody. Try some and hopefully you'll be pushing your arms out like that. You just gotta translate it into the flip.
-To get more height, I have people visualize the dive-roll technique over a high obstacle. This will force you to throw your arms up as well as "hollow out your chest" which, from experience, seems to make for a great flip. (Many people say you need more height but "jump higher" doesn't help on it's own.) You could also imagine you are flipping onto a surface higher than what you are starting at. What also happens with the dive-roll technique is there usually ends up to be a short pause between the take off and the tuck which also happens to have you tucking right at your peak height.