I think a bigger jump with more pop, keep that head looking for that landing and maybe spin a little faster(will depend on jump size). Maybe I'll catch ya at Roundtop tuesday?.
Try to get that 5 solid first, then either spin faster, or get way more "pop", or both.
I am seeing 5's not landed.
Then if you can't get the pop of that jump, move to a larger jump.
Good luck!
Unfortunately you set the trick wrong here as you figured out by yourself .
What you did there was a proper off axis cork 5 rotation - usually looks like that on a straight uncarved take off.
What you need to do in order to get your cork 7 back is:
Don't dip that hard with your head. You overdid it here.
Stop your video at 00:30 - observe your right shoulder and arm - they are trailing when they should be leading simultaneously with your head. Your head is just fine just sync your upper body with it.
Aim to get inverted towards between 180° and 270° not earlier.
voilà your cork 7 is back. you can view my tutorial to compare the take offs.