My advice, stop spamming your video across multiple threads. Second we cant critique style if we can see your lower body which makes all of your video pointless for help, and it is tragically boring. I'd suggest learning to cut sections out but had you done that there would have been nothing left.
If you're actually looking for help, film your lower body as well, if you're trying to work on video, well lets just say you should make an actual video, not just one long continuous shot of nothing. And if you're doing this just to try and show off your riding and gain some cool factor, well you'd be accomplishing the exact opposite by posting video of casually riding down a green or blue groomer and doing nothing.