Shallow under the right shoulder
You were swinging over your right shoulder in your downswing before, and now you are under the right shoulder and going through the bicep. This has shallowed out your swing. The ideal transition is just under the right shoulder, through the right bicep, and down the line.
Channel: PorzakGolf
Watch official source at 6:51Why this context matters
Video-feedback checkpoint for the shallowed transition.