I use AVIs as materials in Poser frequently, to animate displacement (water ripples, combat wounds) as well as animating diffuse color and sometimes transparency. 

Akitam, is your machine 32bit or 64bit?

Bar-Code:  use a frame number node and a math function node (to adjust the frame number) to shift the movie's start point.  This screenshot is overkill for your purposes; it addressed someone's question a month or so ago about starting and stopping a 125-frame movie at specific scene frames.  But it was already in my Photobucket. ^^

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