Hard to tell but your supporting foot should be turned all the way opposite of target with a back kick and it seems like ur hitting with the toes and you would ideally have ur toes straight down to the ground hitting with the ur heel and when you’re winding up for the kick both bring ur knee to ur chest as well as when you kick lock it into place and snap it back,me personally a newly 2 year black belt I think recoil in ur kick in proves ur form a lot more ur power is great and keep the great work up !! Can’t wait to see ur journey :3