I like most of what I see here. I do have 2 things I'd suggest you work on revising. The first is the landing point. It's quite to your right side of the target line, or "closed". A side view would be necessary here to see this but I'm thinking that this landing closed issue is the result of a combo of 2 things. The fairly significant counter rotation (over rotating the hips and shoulders away from the target as the stride foot comes down from knee lift) and a lack of momentum toward the plate. The 2 of these together MAY be causing this closed landing. I'm not going to say that counter-rotation is absolutely wrong but I do think yours is extreme and is contributing to the problem. Your front foot turns toward the target very early. Watch how soon your toe points. This can have the effect of opening the hips early.
Try getting more momentum toward the plate, lead with the side of your front foot longer during the stride and land on line.
The other thing to look at, which might also be caused by the preceding discussion, is that your front knee at landing is WAY to your left of your landing foot. Try to stop the video at front foot landing. You'll see what I mean. What 3up 3down said about you falling off to your left, I believe, is the result of this misalignment of the front knee/foot AND the very good trunk flexion and shoulder rotation that you do have. Now, lots of pitchers fall off to the glove side and they make it work just fine. It can be looked at as an indication of good, full shoulder rotation. In this case, it's not a productive thing because it's real cause is from problems elsewhere.
My opinion is that more momentum generated in the stride, sideways, toward the plate and a better landing position will allow you to really rotate those shoulders harder than you do now. The energy from the lower body will hopefully be transferred into the upper body, rather than being dissipated into that "loose" front leg.