Hello Jarvis,
I have a similar problem to the original poster:
I want to run an *.avi stimuli. During the video the user is required to press a button. I want to register this reaction time, but also I want to video to continue playing.
Your suggested option doesn`t work at all.
Thanks for any help in advance
Emilio

ps. the vids are roughly 30 seconds in duration, 98 megs in size.
ps. 2 - i also want to do the same with audio clips.