I'm no pro, but I've been working solely on trying to learn to hit a draw to overcome my own swing problems and inconsistencies. So take this as you will. The message of that video is exactly what I was going to recommend. I didn't turn my hips enough at the start. I learned to keep my hands in super tight, but the get them not coming OTT on the down swing I cocked my wrist at the top to try to slide my hands down super close to my blocking hip and suffered constantly from blocked push-fades. Keys, feels, and issues that have helped/hindered me:
1) Feels like a very big turn and a flatter swing
2) Key for me has been not overdoing the hip turn to the point of over-straightening the back leg, raising the back hip too much, and dipping down with the head
3) Another feel that's helping me is feeling like the hands come into impact under plane
4) That helps me counteract another problem, which is don't spin at the top. If my first move is a baseball-y shoulder turn at the top, I undo all the good from the hip turn and go right back to choosing between pull-draws and blocked push-fades.