It should be possible, you can assign a movie node to pretty much anything AFAIK,so why not the floor? 
Mind you, I haven't actually tried the movie node ever, and I vaguely remember something about setting the frame number ect to make it work :)

Most likely one of the more movie-savvy people will pop in here soon :)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.