I only picked up on two things, in the first video, where you cantered over the jump, you seem to pump with your hands. Keep them steady so your horse isnt getting little tugs on his mouth. And on the last video, with rosie, you got a little ahead of her. You went into jumping position before she took off. Some horses, when going over higher fences, will slam on the brakes if you do this because by getting ahead of them you put more weight on there forehand and they don't think they can jump it. Just make sure you don't go into jumping position untill the horse takes off. Other then that, well done!
For without a horse, i could not fly.