Is it possible to create a call file on asterisk that would call a video phone and play a video file ?

What is the format of that file?
I can do this now with a softphone for audio and it works fine.

I am familiar with audio call files and use them all the time. Video is now a different question.

( I did just try to post to the video mailing list, but noticed the last entry there is REALLY old)

Thanks,

Jerry