Here are the C&C Renegade campaign and intro cutscenes in 4K / Ultra HD format.
WARNING: You need 15GB of clear drive space where your RenHD installation folder is. Please backup your existing .BIK files in case the 4K resolution does not work. These will replace 1080p cutscenes with the 4K version. Due to W3D Engine limitation used by Renegade, the difference is sometimes very minimal between the two versions.
Download and install these .BIK files to your <Ren HD installation folder>/Data/Movies