One view is enough. Down the line is what most golfers send and covers the most; face-on adds your tempo. If your package takes two videos, film the other view too. No markers, sticks or calibration needed.
Down the line
Stand the phone behind you, about 8 to 10 feet back.
Line it up with your hands, pointing along your target line.
Phone at about hand height.
The whole club stays in the picture, including at the top of your backswing.
Your whole body, head to feet, stays in the picture.
Face-on
Stand the phone in front of you, across the ball, about 8 to 10 feet away.
Point it straight at your chest, square to the target line.
Keep yourself in the middle of the picture.
The ball and the whole club stay in the picture.
Phone at about chest height.
For every video
One full swing, from address to finish. Trim long clips to the swing.
Keep the phone still: lean it on your bag or use a tripod.
Good light, and don’t film into the sun.
Only you in the picture.
Normal speed or slow motion both work; say which on the upload form.
MP4 or MOV, straight from your phone’s camera, up to 50 MB.