Yes, you should be able to move each piece of the body independent of each other. (Hips, rib cage, and shoulders). When you can do that, then you can start asking for total body control. Posted via Mobile Device
Not all horses have to run with their head cocked to the side or have bend drilled in them.
That's Marthas style. ..and to take a horse that most likely runs differently and try to drill that style upon them is asking for trouble.
I watched your video and whike I think your horse could be suppled up some I think the biggest thing you need to instill in him is keeping the hind enagaged. If you start doing all these bending drills before that hell just noodle his neck and evade using his hind and staying connected even more.