You can apply the movie to any UV mapped surface.  For a floor, you might plug a simple flashing-color-squares movie into the ambient node to make a disco floor.  Or you could cast "shadows" of blowing autumn leaves.

You don't need to use a frame number node or modify the frame number unless you want to change play speed or shift the start/stop timing.

Plug a wavy movie into the displacement to make an animated water plane, or use it to control the normals and you have swaying windblown grass.

What specifically do you want to do?

Bubbles for the jukebox' neon tubes. ^^

Now, a warning:  if you're using Poser Pro or Poser Pro 2010 and rendering in 64bit, you'll likely find the movie node nonfunctional due to lack of corresponding 64bit video codec.  In these cases, I use a matrix instead of the movie node.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5