So its no secret that Microsoft has been trying to offer alternatives to other companies products. With the latest scuffle between Google and Microsoft perhaps a Microsoft run YouTube replacement isn't too far over the horizon. However Video sharing sites are extremely difficult to get people using. You must have a critical amount of users and posters.
So my question is: What do you think Microsoft would have to do to make there YouTube replacement a success?
Ps. Here's a mock up I made cause I was bored: