OH, I see now -- you're using Vizzie. Yes, in my patch, you can delete the jit.qt.movie and connect the PREPEND READ object to the right inlet of PLAYR (jit.qt.movie does the same thing as PLAYR).
The trick for making your patch work is that you have to send a floating point number (one with a decimal) between 0. and 1.0 . Here's a simple fix to make your code work. I think it will work best if you change the random 100 and / 100. to the number of files or a little larger.