I've followed Cameron Marshall from time to time from a long time back.
His Why Do My Concussion Symptoms Keep Returning? video is good.
Why Do My Concussion Symptoms Keep Returning? - YouTube
He has a few points that he misses by a mile, He's 100% wrong. But those are the controversial points that many argue based on their personal biases. He has also obviously missed some of the research outside Univ of Buffalo.
I seriously caution people to not binge his YouTubes. Too much information. Much of it needs to be understood as much more complex that it sounds.