well when i do something like this i really do it frame by frame,
try to stand at all time to achieve a realistic replay,
now u dont have to do that, but you could relax a bit more
keep ur balance, and when ur infront of a wall u have to jump over
really do it frame by frame and prepare the jump and u dont have to make a front or back flip a normal jump can look just as good. thats about all i know hope it helps
and goodluck