Here is a simple script that allows you to play video synced on two screens using mplayer. The script allows the user to select the video they would like to play from a specific folder.
Ensure you have mplayer installed; it should be readily available from your package manager.
Copy the code into your favorite text editor.
You first need to define the path to your video directory, by editing this line in the code:
Save your file and place it in a directory that is easily accessible. I currently have mine placed in the bin folder in my home directory. You can also place it in the /usr/bin directory if you like.
Make the script executable by running the following command in terminal, with the correct path to the script.
chmod +x [path to file]