As one commenter pointed out, this is not RFK's Funeral. RFK did not receive a state funeral.
Based on the use of the Senate steps instead of the central steps, and the Christmas Card in one picture, I am now confident this is President Johnson's funeral in 1973.
Before there were VCRs, my parents would take pictures of the TV screen during major news events. They shot 35mm slides. This video is a collection of those slides, shot during the 1968 Funeral procession for RFK