- the frame rate on this phone video is not high enough for capturing the hitting motion
- the video is taken from the worst of 4 cardinal directions
His lower half, which is all I can really evaluate from this video, is generally OK, but he's not getting his hips through--which is a real killer. If he makes his back knee and his back hip the initiators of the swing, he should be able to clear his hips better. The back knee rotates toward the pitcher, followed by an explosive movement with the back hips to get separation from his hands. Currently, his hands catch up and beat his hips to the ball. I can't tell from this angle if or when he's slotting his back elbow. Another video should reveal that.
The only thing I can say about his upper half from this video is his hand position is a bit low and his bat is sagging over his shoulder. That increases the moment of inertia of the bat, making it feel heavier and slowing down the swing. He's also making it worse by lifting the elbow and dropping the bat on his shoulder during his stride. He's gonna be really slow to those inside fastballs.
Once his hands get out in front like they do and he's wiffed the cheese that change up or low curve would finish him off like he wasn't even there.
His bunting technique is horrifying Rotate the lower half like in a normal swing, and square the upper half to the pitcher. Keep the bat still and almost level at the top of the zone and adjust to the height of the pitch with the legs and not the arms. Use the lower hand as the tiller. Extend that hand to push the bunt to 1st, retract that hand to drop it down 3rd. If he has to reach or raise, it's a ball--let it go. If it's inside, rotate toward the umpire and take one for the team. He's got that thing on a 45 or more and he's jabbing / lunging at it. No chance. He's got a better chance of fouling one off into his face.
Give me a better video from either the rear or 1B dugout to work....preferably the back so I can see pitch location and how he's compensating for different spots.