Less looking at what your horse is doing, more feeling what your horse is doing.
You are 'taking' contact instead of allowing the horse to 'seek' contact, therefore he/she is never quite in front of your leg and always a bit behind the aids.
You ride your horse with the 'door closed' and 'downhill' instead of with the 'door open' and 'uphill'.
Wait a moment longer before the jump...you're almost always a touch ahead.
More sitting up prior to the jump and asking the horse to come under from behind. Most of the jumps are simply cantering to the jump...that's okay, until the fences get bigger and the courses more technical. You've got to be able to adjust your horse and ask for more engagement coming into the fences.
On landing, several times you pulled your hands 'back' and the horse's head popped up at the sudden pull back. The horse needs at least one more stride with it's head out. So, keep your hands forward for another stride before sitting up and taking them back.