asterisk users - Jun 2007 - AGI "RECORD FILE" for a video message

I have used the AGI call "RECORD FILE" before for an only audio
message.

I pretty much always used "RECORD FILE filename gsm" before.

What paramater do I use for gsm so that if video is present it will record
video also and still work for only audio.

Will this recorded file (with video) play on a video phone when
calling out with a call file in outgoing spool?

Thanks, I am using 1.4.4

Jerry