Your front leg is poked out too much causing you to rotate. You're probably a little scared which causes you to get on your back leg as you shy away from the wake. That's what causes you to stargaze and land on your back. If you balance your weight from leg to leg equally and get the rotation under control then your board should naturally drop back underneath you so you can land it.
its only like that cause i ripped it off facebook it only rips video in the damn vertical format.. i have a gopro on the back of the boat but it was dusk and didnt show up goood. couldnt see me through the tree line.
Eric is right, if you are stargazing, you have too much weight on your back foot. Square up through the wake so you have even pressure on both feet and get that board inbetween you and the boat right before takeoff.