Video #1 - The shape of your "J" is not so bad on this one, but some interesting quirks in your approach! Watch how you chop step 9 into like a half-step, and then for step 10 you actually step out away from the bar a little, to help you turn your back to the crossbar? So I think 7-8 are normal and OK, but then 9 being a shortened step places it farther from the crossbar than desired, then look how 10 is just barely closer to the bar than 9 was, and your plant foot toe is not pointing at the farther upright, but is facing out away from the bar. The last frame with your toe still on the ground shows you're taking off TOO far away, and so to make sure you get over onto the landing pit, as you can see, your "release" of the jump is nowhere near vertical. One quick note for your in-flight mechanics; in this clip we can see your head in every single frame is in FRONT of your torso plane, so the jump never gets an arch - it is a slight sitting position the whole way. Video #2 - OK; approach shape problems on this one. Step 7 is still in the 1-6 line instead of coming across the 1-6 line to start the turn. You lean hard on 8 which is a pivot/spin step - look at all that lean on 8! Also on step 8 your foot looks to be almost parallel to the crossbar? Then step 9 is the half-step. And this is a more common problem, but after all that Lean on 8, look how 8-9-10 are in almost a perfectly straight line - the result: NO lean at 9-10. Look where step 10 is - on the seam between the second mat away from the bar. Go stand out on the approach at that spot and see if that's where you want to be jumping from - YIKES!!! Video #3 - Slightly better on this one; 8-9-10 are not on a perfectly straight line, and so you do have a little Lean as you get into the crossbar... Still chin-on-chest the entire flight though. Video #4 - This is similar to your 5-0 jump from the meet. Peak height is well over the bar, but 6+ inches in FRONT of the bar; very close to the bar or grazing it on the way down, and landing near the front edge of the mat...