This is a re-post, sort of, of a video created by Bryson Reynolds a neuroscience graduate student. His area of study is concussions and mTBI. He shortened the original video for easier consumption, it still holds the essence of what makes it a good too for us to use; stark and striking objective mechanisms of injuries, across all sports.
It is barely over a minute in time, again this is a great teaching tool for those trying to understand the mechanisms of concussion. If I counted correct only 4 of the clips show head-to-head contact. THIS IS EXTREMELY NOTEWORTHY, as concussions occur without direct blows to the head. Also note the concussions (presumed by the filmmaker due to descriptions of the original videos) that occur due to contact with the ground or ball. Perhaps the most disturbing videos are the last two, youth sports.