two things: if you have wider bars, this will be alot easier as a trick. I saw your vid and noticed you have about 13 or 14 inch. so this is what I did: hit the jump with ALOT of speed. with skinnier bars I needed to flip slower to stop the scooter flying out from under me. next you have to kick the whip out as soon as you leave the ramp. if you're not already used to catching tailwhips, you should practise that because catching it is a really vital part to this trick. so after you leave the ramp and have kicked the whip, pray like fuck that it is spinning right as you flip. when you're upside down stick your kicking foot ( or catching foot ) into position. this is where being familliar with tailwhips comes in because you cant look at the scooter as you flip. if all goes well the scooter will once again be under your feet. now spin the rest of the flip, land and roll away.
P.S. trust me, flip whips are my thing