How to change the animation (like smoke animation ) screen for Main Menu?

[Zaselim]

Hey guys how are you?

So i know how to make and change the Main menu Background wallpaper/screen and I know how to make/change a Intro Animation(BIK video), Now the thing i don't know and never tried is the Main Menu Animation+Sound.

So how do i make one, I am assuming that like the intro a BIK video file is required for the animation but for which folder or what other thing do i need to do. I know how to work in CK (I use it to make armors and Custom followers).

So I will be grateful for any kind of tips / directions / Help. I just want to make my own complete main menu screen (Right know my skyrim has the my own intro animation and main menu wallpaper but I also want my custom animation for main menu and sound lol)

Again I will be very grateful for the help.