"just looks wrong".....biggest test mate is ball direction and flight,looks can deceive though.FG..https://www.youtube....h?v=ZSy30hPFEVA
It looks wrong as though the person who digitised the motion put the sensor in the wrong place on the elbow. And Moe Norman
On the bigger question, here is a video of Dustin Johnson. Tell me whether his first action on the downswing is to straighten his right elbow as Zen would have us do or keep it bent and near his body to generate lag. The face on part is in the second half of the video.