All four, the way he tied off, and the knot, looked like Pro - not Parnell - knots to me. He went O-U-T, then he sent it under the loop over the anchor string but the opposite direction it went O-U-T. That's not how the Parnell knot is tied. Pretty sure he didn't tie three Parnell knots and one Pro knot.
@Rabbit would you like to deliver a verdict?
Anyway, who cares? It's a discussion about starting clamps, which became a discussion about whether it's best to tie off with a starting clamp, pliers, or just your hands.