Yeah, I would but I really don't have someone to take a video of me.
I have noticed that the side reins have been doing the work for me, because his head is round and pretty and it is forcing his head down. That lead me to not have collection in my reins.
Now that I took them off, as soon as I get contact in his mouth at the trot he will begin to pace. I hold steady and push him forward with my seat and get him back into a trot. Then I notice when I have contact in my reins, I am leaning way forward to get control of his head. I pull and release with each rein and he will lower it maybe two inches but not nice and round like in the side reins; and 3 seconds later he goes back up.
He is traveling in a very hallow back without them I have noticed, and at the canter too. He is still learning to hold his leads in the canter (He likes to switch them in the back) so that makes it even more of a mess.
I think he is just trying to not listen, because I know he knows how to respond to leg pressure and tightening, because he will usually listen at the walk.
Well, good for you for wanting how to learn how to connect the horse to the bit on your own.
However, without seeing a video of you riding, it's hard to really know what's going on. I mean no offense, but it may be that your horse does not want to connect to the bit and "round" becuase you don't have a steady enough seat. He may be going in such a way as to protect his back.
Or, as you said, he is not listening to you. The side reins made him HAVE TO go in a rounded neck way, because there was no real give. Moving that way can use more muscle, and muscles that he may not be used to using, so once the force is gone, he will revert to his easiest way of going.
But if you say he is not listening to you, you either don't have him thinking of you as important enough to obey, or, you don't know the correct way of asking. (And that's what you are asking about now, right?)
Would you consider posting a video for critique?