I’m not sure how you are sending out signal from your computer (i.e. a mst hub?) to to 3 screens(led or 3 projectors?) but that said, one possible solution is to send the the 3 movieplayerin TOPs each to a resolution TOP and make all 3 .jpegs the same rez. Put each in a container COMP as the background and set the container’s layouts the same (i.e. 1280 x 720). Encase in a parent container COMP with a width 3 times the width of the inside containers, attach to a window COMP and you should be good.