Full disclosure; I probably have no business giving you feedback or pointers on carving a hardboot setup. But since this is the internet, I feel obligated to do just that. This place is full of incredibly knowledgeable technicians, people who can convert snowboarding into physics/engineering concepts and see things I'll never fully understand. It also needs idiots like me to balance things out so that others don't feel quite so intimidated.
In watching a lot of expert carvers, the one thing they seem to have in common is a full commitment to the carve. In some cases, it almost seems like they're falling forward and letting the arc of the board catch them on the way through the turn. It can't be done without committing. That's one thing most softie setups don't demand, unless you're hitting a big booter or riding a steep face, so it's psychologically a different task. Maybe the angle of the board to the snow is a proxy for commitment? But in the video it doesn't look like you're fully committed to loading your edge and accepting the consequences.
After about 25 years of riding, I'm learning this lesson myself on a softie setup. I rode plate bindings on a freeride board for a couple seasons in the early 90s and remember the unnerving sensation of stumbling onto a really locked in heelside carve and feeling that I wasn't going to be able to get out of it. Now I'm trying to re-discover that sensation. Best of luck and thanks for posting the video!