One of the data-sources available within VDMX for controlling playback, FX, and composition parameters, is the current playhead position of each movie playing on a layer. Like an LFO or audio analysis value, you can assign this to any slider, button, or other UI item by using the UI Inspector or from the right-click contextual menu.

In this tutorial the movie “normalized time” parameter (time as a percentage, ranged 0.0 to 1.0) will specifically be used to synchronize the playback of multiple movie files – this can be a useful technique for working with batches of clips that have the same duration, and high-end projects that involve powering more displays or projectors than can be connected a single Mac.