Best way to display a video both on a main and secondary screen (synced)

Hi,
Im writting an AIR desktop application.
I want to show a HD MP4 video on a main screen and also show the same instance of the video running on the secondary screen.
Can anybody think of a good way of doing this?

The only way Ive thought of doing it is to have to my two air programs running and for them to chat through a local connection.

When a mp4 is played in the main air file it tells the secondary air file to also play it.
I then send every x amount seconds what frame the main exe is onto the secondary file to try and keep it synchronized...

..Any ideas?

Thanks
Aidan