It sounds like you already have the clip made which is the hard part. Now you can just upload the video to google. I would download their uploader tool as that shows the progress of the upload, otherwise you won’t know how much is uploaded and it takes a while even with a good connection.
http://video.google.com/support/bin/answer.py?answer=31701&topic=11461
General help
http://video.google.com/support/?hl=en
Once uploaded you will have to wait for them to approve the video, when ready click to your video and copy the link to your message here. You can use the board codes on this message board to turn it into a direct url link, the same way you would imbed an image in your message. Hope that helps.