videoControl(what command)
From pinHeck Wiki
Single steps a video that that has its Manual Step attribute bit set.
Currently the only command is "6" which means single step forward.
Example:
video('V', '1', '0' + random(5), manualStep, 0, 255); //Start a video with manual step control
videoControl(6); //Advance the video 1 frame upon some sort of input