Check forearm alignment, not just the clubface, at setup
The instructor shows that your setup can point the forearms wrong before you swing: if your trail arm sits above your lead arm, the forearms form a 'circle' (path) pointing left of where the face points. The fix he demonstrates is to turn the lower/trail forearm so the face and the forearms line up together at address.
Channel: Danny Maude
Watch official source at 3:37Why this context matters
Framed as the first check because 'you've already got a bad shot built in to your setup.'