I didn't hear anything in the video about the US House Select Committee on Assassinations; it does talk about Oswald being the lone gunman, that the mob had nothing to do with it, and the findings of the Warren Commission. In 2003 the chief council of the HSCA said, "Significantly, the Warren Commission's conclusion that the agencies of the government co-operated with it is, in retrospect, not the truth...We also now know that the Agency set up a process that could only have been designed to frustrate the ability of the committee in 1976-79 to obtain any information that might adversely affect the Agency."
Why did the CIA bring out of retirement George Joannides, the agent who had had contact with the same anti-Castro group as Oswald, and at the same time as Oswald, and put him in charge of "fascilitating" the research of the HSCA, and without telling anybody in the HSCA about Joannides's background? As Blakey said, Joannides should have been testifying, not working in the investigation. The HSCA's reserachers complained that Joannides was acting as a "filter", not a "fascilitator". What was he filtering? We'll never know, thanks to the CIA's obstructions. Did they go to all of this trouble just to make sure that nobody in the agency would look bad? Is it not natural to wonder just what the CIA was ultimately trying to hide?
Whatever the exact truth is, the CIA didn't look very interested in finding it. That agency has lied to the citizens of this country many times and it has engaged in terrible activities from the beginning. I don't know why anyone would trust anything that they are involved in, which very much includes these investigations into Oswald's activities before he assassinated JFK.