OK Saki, from what I can see, you are trying to roll like you would in the waves.
It looks like you're trying REALLY hard to get up high, instead of focusing on your rotation.
The two key things I have found that make a HUGE difference are this:
Put your pole ON the hood - litterally, listen for the 'clunk' when you leave your set-up wave.
Smack your butt with your heels, and land that way.
Those two things made me get all the way around.
And another KEY thing to do is twist your throttle so that it's pointing farther down.
It will force your elbows up, and get you over the pole and in a better position.