If you use photobucket for still photo`s, there is a tab there to upload video clips from your PC then you just copy/paste the link for the image url as though it were a photo

Photo-posting help here : http://www.dogsey.com/showthread.php?t=38501

If you follow those instructions for Photobucket you`ll see that uploading then posting vid clips is the same and its easier than you probably imagine

If you want to try You Tube rather than photobucket, info is here :

http://www.dogsey.com/showpost.php?p=905035&postcount=1

But if you get stuck at all, just pop a post onto the Forum Support section here :
http://www.dogsey.com/forumdisplay.php?f=10

HTH