When turning backside, try lifting your elbow higher and out to the side which should help you twist and keep your back straight as you're bending over from the waist.
Also it looks like you're holding your breath as there's a lot of tension in your face, so try blowing a raspberry to help you relax 🙂
Replied on Made it to the Atlantic Park Surf Lag...
26 Oct 05:40
It's certainly better, but I think you're right about the front arm.
Also you're back foot heavy and not looking to the foam where you want to go.
Maybe some more practise on the surf skate 🙂