You're trying harder to get upside down than you are trying to jump in a backwards and up motion. Look at the video frame by frame ans watch the backside of your hips. During the very end of your sit and a the start of your push, your hips are even with the window to the left of the entry to the house in the background The next motion you see is your hips moving forward and up, so your bhs ends up going upside down "in place" and puts you into a handstand with no remaining energy to move you through the block and stepout.
Try to gradually push back more and turn your head over slightly slower. There should be a brief moment where you can see what you're jumping away from, so it may help to look forward until you start your jump, and concentrate on jumping away from what you see in front of you because, if you really think about it, you can't jump to something...... rather you can jump away from something, and end up somewhere opposite the spot you jumped away from.