Video #1 - Pacing of your approach is flat, not the ramp-up we want. Also pre-turning shoulders away from the crossbar before you enter step 10. You have good Lean in 7 & 8, but then un-lean at 9 which is early. Chin on you chest in flight is a problem also. Good news is you are fearless about landing high on your back and neck. Video #2 - Pacing is better in this one. Last frame with your foot still on the ground shows you are already well into your arch position before you've even left the ground. Peak of the jump is in front of the bar and you strike it on the way down. This is due to not much Lean at the end of the approach. Video #3 - This one shows a pretty straight 8-9-10, low release angle, and a diagonal body orientation over the crossbar - all things we can work on. Video #4 - Look where your shoulders are pointing the frame BEFORE you plant foot hits the ground on step 10! Yikes! You shouldbe facing directly toward the farther upright. But I LOVE your pile-driver landings in the pit :-)