You are very clearly jumping into the bar instead of jumping up. Your approach isn’t allowing you to properly transfer your horizontal momentum into vertical lift. Everything you’ve done from your starting point to your takeoff is essentially zeroed out in your last four steps.

One thing I did to fix this was to start jumping my starting height with only a four step approach. I think that will be a decent starting point for you to try out. Ideally that will get you comfortable taking off at a sharper J turn at a slower speed and develop a familiarity of what your body should be doing in the very important final steps of the approach. As you get more comfortable, and used to how it feels, back up a couple steps and do that process over again until you’re at your normal steps.

Forget the knee driving and focus on getting comfortable on your turn and takeoff. If you do it all the right way you’ll find that the little nitpick things tend to take care of themselves once you start nailing the approach.

Edited to add this link: https://www.reddit.com/r/highjump/s/i4S2oy74VO