This year will be a transformative one for online video as advertisers are routinely buying seven-figure campaigns, says Jason Glickman, CEO of Tremor Media, the big New York-based video ad network.

He says that an "up front" marketplace for online video is emerging as significant dollars are moving from television to online.

He also says that his company's network reaches over one billion video ads per month on 1,400 publisher sites.

I caught up with him earlier this month at the OnMedia conference.  

Update:  Michael Learmonth at Advertising Age reports that online video advertising could rise as much as 50 percent this year.

Andy Plesser, Executive Producer