use video and create a compound screen

[mamadator]

I want to make sure I understand. The video is only 30 seconds long and you want the message to come up after 30 seconds.. but you don't want the message to interrupt the video.. but the video should be over by then no?

Yes, the video ends after 30 seconds, but I want the final frame of the video to stay up for however long it takes the subject to respond to the instruction. The instruction should come up right before (1 or 2 seconds) the video ends and to stay there untill the subject responds. Also, the RT I want measured is from the moment the instruction comes on screen.

Thanks