I saw it a little while ago and found it disturbing on many levels. I can almost forgive the cheering onlookers, as they may be clients themselves and may not be aware of the serious risks involved in what is taking place.
The trainers or “coaches” actions are reprehensible. My personal feelings for Crossfit aside (I believe there are pros and cons), this video is a perfect reminder that “certified” does NOT necessarily mean “qualified.”
Any trainer, Crossfit or other, that stands around and watches or encourages technique like in the video should seriously re-evaluate their career choice.
I just hope nobody in the video, on or off-camera, was injured.