For the raiz, i didn't really see the resemblance to the video. If you're using that as reference tutorial for the video I think you have a differen't trick, not a raiz. From my experience with tricking that looks closer to a tornado kick because you didn't get any arch in your back and didn't do more of a flip + i think i might have got you beaten there with my raiz, i'm not sure, up to the judges.
For the backside 720 It looked like you were going into a different trick with the swing through and high sweep at the start. I would suggest standing still like the person in the video. I also thing you're missing some of the spin required for it to be a backside 720.
I hoped this helped you out. Just trying to share my knowledge, choose to Absorb or discard it.