Haha interesting advice...Ok well listen up sonny! Tre flips are all about that back pocket. It looks like you sorta got that part down. Now seriously, in that video it didnt look like you tried to commit even a little. So get your toes in that pocket, not too far in though, or the board might flip outta control. Now move your front foot to wherever you would when doing a kickflip. If that footing doesnt work, try moving your foot lower/higher, when a lot of people are trying to learn they keep their front foot kinda far back, about an inch back from the center. Now you just scoop from that pocket with your back foot and just give a little flick with your front foot. The scoop is the most important part. It looks like your board might be flying out in front of you because you are trying to karate kid kick your board to space. So let up on that front foot, and just give a little flick, because the back foot is really what scoops the board into a tre. Good luck man, keep playing around with it I'm sure you'll get it! Dont give up!