Stone gets a few things wrong in his presentation, but he also makes many valid points. Stone is a good example of the phenomenon that a person can do good research on some issues but do terrible research on other issues. I don't use Stone's book because I think he has severely discredited himself with his argument that photos of the Biden White House show a "satanic portal."
In his presentation, Stone recounts an incident that I've long found to be revealing and suspicious: LBJ's fierce last-minute attempt to get JFK to let Connally and Yarborough switch cars. LBJ was so adamant that he and JFK got into an angry shouting match about it.