Kid looks great, mostly. His front foot lands open for sure but I’ll suggest that it’s because he opens it up waaaay early. Watch how the toes point to the sky and you can even see the bottom of his right foot just as comes down and he’s about to start into the stride. It then turns toward home immediately. Try having him lead with the side of his foot or even the heel and do it longer. I’m not so concerned about the length of the stride because he’s getting some good momentum. I’m just concerned that his mental imagery on it is to throw the foot out there as opposed to firing the lead hip and the centre of gravity sideways toward the plate.
The next thing I see is posture. Now, the NPA guys here can speak to this well but what I see is that he starts out fabulously with a nice “sit” into the beginning of the stride, head positioned well, leading with his hip. Then, at front foot landing, his head is tilted very far back toward the first base side, bringing everything else with it. Combine this with the open foot and you have a lot of stuff moving away from the direction he’s trying to throw the ball. I’d suggest asking Roger or laflippin to help in this regard.
The last thing I see is that, at landing, his throwing side elbow is really, really low. That’s mitigated a bit by the fact that he’s tilted so far back and the camera’s not exactly perpendicular to his spine angle at that point but it’s still very, very low. See if you can get that a tad higher, somewhere around shoulder height when going through that zone.
Just some fine tuning but this kid has some nice things going on. Keep up the good work.