When i watched the video and your cut out was more than enough out, you waited like you should. Cut in seemed solid, let off just a little bit before the slomo, but nothing serious. Your actual flipping motion is a little mexican (front flip) instead of tip over tail, but lot's of riders do it this way. To fix this i focus on putting my right ear to my right shoulder as i take off and literally think of extending the curl of the wake with my board.
On the landing it seemed like you extended your legs to early suggesting you went bigger than you expected, so work on your air awareness, by doing the trick more and just getting used to the feeling. But once again this is fine because it's much better to take this trick bigger and into the flats then coming up short.
It seems like your worried about the angle of your board on the landing and this is the issue. With most tricks the board should be facing the direction on the landing as it did during take off, so this is actually a good thing. I know it's scary cause this is how you catch edges, but let your momentum carry you out into the flats, with slight pressure on your heels, and you'll be fine.
So really you have this trick, if you pause the video at 1:00, you have the trick landed. You're slightly on your heels, but that's easy to recover on. So go out there, have a beer or two (helps with the scared mentality, but doesn't slow down your reactions), tell yourself "no matter what I'm not letting go" and I bet you riding away from a backroll