I took one step further and played this song while watching a tuner. As he strums, the tuner registers C, then F. I'm going to look into this C5 and Csus4... And also try to match his strumming pattern.
You can do camera angles easily: use two cameras simultaneously and blend in post production. Or, shoot the entire number with one camera and, in a second shoot reposition for a different angle. Blend in the second camera in post production. I've done it both ways. Obviously for a live stage performance you need to shoot both cameras simultaneously. At home you have the flexibility to add additional angles after the main shoot.