Feel lead shoulder far from lead toe for extension
The speaker describes what he calls lead side extension: as the hands reach parallel with the belt buckle in the downswing, feel the lead (left) shoulder move as far away from the lead toe as you can. He points to Tiger Woods as an example.
Channel: CraigHansonGolf
Watch official source at 5:13Why this context matters
Said while analyzing tour swings (Tiger, Fleetwood) on video.