Sharmyn,
To do this, you will need to click the down arrow in the top right corner of the PAGE at the bottom of the MediaShout 6 program. Here, you will click the dropdown list that shows Manual by default and click the arrow to the left of End of Media and then select the video. This will tell MediaShout to automatically advance after the video finishes.
Let me know if you run into any trouble or if you have any other questions!
Thanks,
-Ryan