From the Yahoo Video Help Page:
On December 15, 2010 the functionality to upload a video to Yahoo! Video was removed and a download utility, available through March 14, 2011, was added to users' video profiles to allow retrieval of content. The user-generated content will be removed from Yahoo! Video on March 15, 2011. We apologize if this causes you any inconvenience.
When I think of video web hosting options I gotta tell you Yahoo Video did not come to mind. I remember an early form of Yahoo Video was rough to use; this was way before YouTube.
Content was scrambled across inappropriate categories and a bunch of the time I'd click a video and it didn't load. It was a frustrating experience and after the fourth time I gave up on it. There were other services that took web video hosting and distribution seriously.
I'm not sure that Yahoo Video did any kind of outreach. They might have, I just don't know about it. Not to vloggers, the Pro/Am folks or to their built-in Yahoo visitors.
It is strange that when point and share videos started to be uploaded they never made the connection to invite folks to use their service in connection with their other portals sites like Upcoming. Or when they had a promotion in one part of the company there wasn't a linkage to encourage participation by Yahoo Video folks or the external community.
If they did, we didn't know about it.
Oh well, lessons learned and unlearned. You can use Yahoo's Flickr to upload videos but there is a 90 second limit.
That might change but you never know.