You are sitting in a pretty dramatic chair seat. Your legs, especially your left leg, are so far forward that they are over his shoulders, instead of his barrel. Then, your upper body is leaning too far back, so you are riding on your tailbone. This position puts you in a place that dampens down his energy and has you always a bit behind his motion. If he were to suddenly leap forward, you'd be subject to rolling off backward.
I suggest you take your feet out of the stirrups and do that walk trot work with them just hanging down. This will help a lot in getting you aligned more correctly.
I agree with tinyliny on everything she put! I might add, get those hands up! Looks like you're holding them in an awkward place, keep them a couple inches in front of the saddle horn.
You need work on your seat, you look is you're bouncing in the saddle more than you should be. Like Tiny said, stirrup less work would do you wonders!
If you want a critique on your horse's movement, post video of him in a roundpen or lunging!
Looks like a good horse for you, well behaved, pretty coloring! Good luck with him!
I didn't realize this , but the OP says the horse is "off", so she was possibly riding slower than normal. I didn't see a clear offness, neither here nor in the thread about his offness. I did see an occasional slight head bobble. Not sure about that, if you think his feet are just tender from lack of shoes.
Other thought he might be off in his rear somewhere.
Hello yes normally I don't ride with my hands so far back Im just working on getting him long and low and this has been working to get his head down :) then we will transition into subtle ques I will post another video with my normal seating, also remember my saddle it too big for my so I sit farther back... ohhh and I have a lesson tonight :)