I often hold my pieces of fabric so it is easier to pin with the pin-head toward the fabric (opposite the video). I have been pinning like that forever. I pull my pin out with my left hand (although I am right-handed). The key is to have the pin PERPENDICULAR to the seam - I don't think it matters where the pin-head is. Now quite a few quilters pin parallel to the seam with great results. So IMO - whatever works best for the individual is the way to go.