Linking video files with Adobe Captivate

Hi good people

I am preparing a video for Youtube and I have two components. The first is a video of me talking to the camera in MOD format (which can be changed to a WMV file by changing the extension - this does not seem to affect the playing of the video).

The second is a screen capture made with the trial version of Captivate 5 which demonstrates how to use certain functions on my website.

What I need to do is to join the two files together in a format that I can then upload to Youtube in a single movie, but I cannot find any way of converting one of the files to the other format or importing both into a separate program altogether so the end result can be exported in a format that Youtube will understand.

I am using Windows XP.

Any suggestions would be very gratefully received.

Thanks

Will