Learn to bunny hop properly to a decent height easily. A three will work best at above 1 foot height hop. So learn to pick the back of your bike up by sucking up your legs. That's what you are missing in your videos and why you pivot because your rear wheel is not coming off the lfoor properly.
Pump the floor to pre-load your hop.
Go in a straight line on flat, not down hill or up hill, flat. You are aiming to start going straight and land still going straight. Pay attention to your head turning and spot your landing.
When carving don't carve 90 with both wheels on the floor, carve while fluidly lifting the front end up and then hop as you get to 90.
Aim to bunny hop another 180, where youwill be at 270 at the peak of your hop height, if that makes sense. If it feels you've done this relax and keep looking over your shoulder at 270 spot the landing and start to straighten up slash put the back end down.
Done.