I just watched C3-PO Clips’ ROTS 4-hour cut. What I think about if is that it has Fallen Order in it. It features Cal’s Padawan training segments, the Cere Order 66 scene during the Order 66 montage, and Cal and Jaro Order 66 despite they aren’t in the Order 66 montage. This cut also feature Shaak Ti being killed by Anakin. Also there were two scenes that aren’t in the film but were on the PS2 which is Dooku’s bonus line and the other scene before the Mustafar duel where Sidious says “You have done well, Lord Vader.” and Anakin replied “Thank you, my master.”.