PoleVaultPower.com

That was a very nice jump. You are ready to jump over the handgrip. In the video you were over the bar before you completed your turn. This means if you can swing longer underneath the pole, in the swing after the plant you will be more inverted. Wow there is another 1 1/2 feet in that vault if you can work on this part.
Check the take off it did appear to be under a sorts and it is difficult to be accurate from this video.

On that pole by now you have added something that is going to bend the pole farther CONFIDENCE yes this also allows a greater transfer of energy, so by now the pole might be soft. You can bring your self back to the same timing as the video by lowering your handgrip by 1/2 fist. This will lift the hips a bit too. Move to a stiffer pole before moving to a longer pole.
As POWER before length.

You’re on your way to full-blown pole vaulting.
Good luck and keep me posted bruce@essxsport.com