Interesting changes in a swing over a short period of time. There are significant changes beyond what is mentioned in the video.
Changes credited include ...
1) Better posture.
2) Adding more of a pullback (pulling back with the top arm and incorporating the back). Greater early lead-arm extension.
3) Launching the upper body back.
4) Turning the barrel at swing launch versus pushing the barrel forward.
Looks like the hitter got more into his legs. More tension in legs will help with developing a better sequence. Staying in the legs during the stride and into swing launch is critical.
Somebody explain turning the barrel? Is this a teach? Would like more info on this