Do a search on youtube about it. It will convince you.
I can’t do that. I saw the Zapruder film once. Once. I’ll never watch it again. I cover my eyes as soon as it starts rolling. Funny thing, in the 50th year coverage I saw one of the best documentaries I’d ever seen. It got to the part where the Zapruder film starts and l turned to my wife and said I can’t watch this. But, the screen suddenly went blank. I thought this is a really strange time for a commercial break. Only no commercial came on. The screen remained blank for a minute. When the showed began playing again it had moved past the Zapruder film! In other words, instead of showing that film, the documentary aired a moment of blankness. It was the best treatment of that part of that tragic day that I had ever seen. And that’s the way I choose to visualize those 10 seconds of that time in history. No Zapruder film for me. I’ll take your word for it that it was doctored.