I would be very leery of this content. A lot of this footage has been edited and modified in the last 30 to 40 years. With the advent of home video recording in the early 1980’s I have noticed that there is a revisionist history of sorts.
The easiest example I can point to is the footage of the casket being unloaded from Air Force One at the return to Washington DC. Original footage showed that as the casket is being unloaded there was a helicopter taking off behind Air force One. I saw it many times and there is a photo of that scene either in David Lifton’s Book Best evidence or Bonar Menninger’s book Mortal Error. Last year I saw the the CBS rebroadcasts as they were being replayed on various cable and satellite channels and I was surprised to see that the helicopter was no longer in the shot. Now I being old enough to have seen the original broadcasts and many rebroadcast in the 60’s 70’s and early 1980’s , I know that that Helicopter was there. Now it’s like it never existed. Why is it gone? Because some conspiracy theorists claim that JFK’s body was in body bag and on that Helicopter and not in the casket. What gives the theory credence was recorded time of JFK’s autopsy at Bethesda Naval Hospital as noted by two FBI agents present. The agents present recorded the time in their note and The Autopsy was started before the casket had arrived at Bethesda. Just one of many odd things about that day that never added up.