to the op, it looks to me like you are a little on edge when popping off the lip. learning to pop off an edge is a useful tool as you learn spins, but when youre just getting the hang of straight airs/grabs i think its better to make sure and put your base flat as you go off the lip.
1.) get your setup turns (try not to scrub speed) as you approach the lip.
2.) when you're about 5 feet away, put your base flat, keep your weight centered, and begin loading up the tail as you approach the lip.
4.) bring your knees up, keep your upper body quiet, and dont lean back or forward. once you get the feel for that floating feeling, then start reaching for various grabs and try some shiftys just to get the feel for moving your board around in the air (will help you when you learn spins).
all this is situational depending on the size of the jump, as you hit bigger features you should just basically let the jump do the work for you and not need to pop as much as others have said.