there are relatively no new ideas in baseball.........were it legal, it would be have been seen before.......have you ever seen that move anywhere outside of that video?....
a number of years ago, a HS pitcher with more than average skills, was using a delivery that in many opinions was like a crow hop..and was being balked regularly...I believe they took it all the way to NFHS.....
The delivery was a sort of leap from the rubber with a release of the ball several feet in front of the rubber...NFHS ruled it illegal....NCAA ruled it illegal.....and the pitcher went on to college using a sucessful standard delivery.....