Windows Vista and Videos

I have Vista and loaded a video off my camera. I have MSN for mail. When I
look in "My Pictures" I can see the video/pictures, etc. Now, getting ready
to email the video. I click on "share photos "on the MSN email area. I can
see where I have my video, but double click to add it and it doesn't show.
This is been a problem since I have Vista, but usually I just send them from
the other computer that has XP. I'm sure something needs to be checked or
unchecked. I have windows media 11 I believe. I have the latest, that I
know. Any suggestions???