I think Rather gave a reasonably accurate description of the zfilm..
1. He said first shot struck JFK and his description suggests that he thought it hit before he went behind the Stemmons sign.
2. He said that Connally then turned around to the President when he was hit by a second shot and fell back on his wife. He did not say he saw blood. He just said that “at that moment a shot clearly hit the Governor”.
3.When he described the impact of the third shot which struck the President in the head he says “his head could be seen to move violently forward” and then demonstrates this by moving his head down and forward in an abrupt movement, not dissimilar to the movement seen between z312-314.
Rather did several telecasts that day describing the Zapruder Film. I have yet to possibly find one where he says he could see "blood", so I might be wrong about the "blood". I did find 1 telecast where Rather details, "...a shot CLEARLY HIT the FRONT of governor Connally....". As we know, the official story line is that Gov Connally was shot in the back. Rather describes the Z Film showing the JFK Limo turning onto Elm St and he also claims the film shows a SS Agent holding a phone in the front seat of the car. I have watched 2 different Rather telecasts thus far.