"Held back" by whom? Released by whom? And if it's such a bombshell, why is it only found on "the Kennedy assassination sites"? All of the clips I found have the same narration track. Who shot it, who edited it, and who's narrating?
Go to the sites and see. It was shot by a private citizen the day of...his family held it back until after his death...it’s there, wish I could remember the site, but it’s one of the major assassination sites.