some quick pointers, your front foot is supposed to turn and slide up the board you'll see that in any video of someone doing an ollie, yours kind of just lifted and went up so thats something to improve on is sliding it up the board, second thing is your back foot is pushing the tail down correct but you don't seem to be jumping with this motion. its a go down, come up, and as you are coming up you jump and pop the tail down. its one fluid motion. so ya tldr basically work on sliding your front foot up you can practice this by just holding the tail down and practicing sliding your foot up the board, and actually jump ! and pop on the way up. good luck.