As we've all grown familiar with the usual default "Blue Splasher" BK2 movie playing in the background while the opening menu and its various sub-components deploy... R&F introduced a new "Eras wheel-like" animation which is still deeply blue inspired. Civ6 (--Base\Platforms\Windows\Movies..) == TitleBG.bk2 R&F (--DLC\Expansion1\Platforms\Windows\Movies..) == Expansion1FrontEndBackground.bk2 These two core files are simply interchangeable with anything (compatible) you'd want. Format must remain BK2 and, the file naming convention has to be the same. Soooooo... as a proofing step i've altered MY opening phase by making a copy/paste version of Time.bk2 through renaming it Expansion1FrontEndBackground.bk2. It works just fine & it's a nice twist of UI context. Try it out.. you won't regret it.