Thanks to Ståle, you will find under his PUBLIC folder, a subfolder called TUTORIAL VIDEOS where he CLEARLY explains how to put (=UPLOAD or EMBED) different PERSONAL FILES or YOU TUBE videos or other online media, in this wiki page.
Thank you Ståle!
HOW TO EMBED RESOURCES IN A WIKISPACE ( (Ståle B,)
Thank you Ståle!
HOW TO EMBED RESOURCES IN A WIKISPACE ( (Ståle B,)
http://www.youtube.com/watch?v=EUmaVb7q374