Very nice overall. I can't comment on your position much because it is a bit far away. You look like you're lined up well and your hands are maybe a smidge low, but your line from elbow to bit appears to be good.
One thing I noticed is that you stay in the same trot and canter without any variations in tempo or stride. It might help with your horse's tendency to dip behind the vertical and hang on the reins to do lots of transitions within the gaits. Also lots and lots of half halts. That first transition from canter back to trot would have been 100% better with a small half halt to rebalance him before the down transition. One thing I like to do it is, every 8 strides, do something different. Change gait, tempo, your position (half seat, full seat, sitting trot, posting trot, etc). It's a lot harder to do than it sounds to actually time everything well enough to do it exactly 8 strides, but it really helps keep your horse engaged and you might find that BTV quickly disappear.
You just have to see your distance...you don't have to like it.