I guess it was the rutted ramp which was causing me to get worried about flatbasing. Granted this was in the afternoon, and it seemed like that day it was mainly beginners out there (soo many people wiping out on the knuckle due to low speeds, last minute bailing etc).
Glad i did go back to basics with my jumps; lots to learn here
I think you may have taken my comments as suggesting to pop off from an edged board which I was not.
Fair play, I just like to be as clear as possible when explaining things like this to a progressing rider. Advanced riders have the ability to feel an edge, pop off an edge and know how to counter these types of motions.
Good vid for feedback. Your back arm is reaching forward which is causing what CheeseForSteeze is saying about opening up causing FS rotation, he nailed that one. Popping will help as mentioned, not too hard but enough to set you up in the air, riding off like that tends to cause you to stay at the ramps trajectory, which is what happened to you there... backseat all the way. I have to say though that ramp does look pretty rutted out and shitty, I tend to find another jump or just go hit rails when the jumps get too rutted out because its just no fun and it can cause you to get hurt.
Here is a screenshot of your body position, you need to get that back hand over your board again so your shoulders are parallel and straighten your back a bit, your leaned over a bit at the hips. If you get that hand back you will run straighter and you won't start to feel rotation on the ramp and in the air.
I'm no expert, but I notice that a lot of pros and other experienced riders will often stick their rear arm straight back (over their tail) when approaching a large kicker. This may aid in balance and help to avoid opening up the shoulders, which can lead to the accidental frontside spin initiation.
I don't know if that technique is correct form (fundamentally), but it's something I've observed a lot.