BrightRoll, the big San Francisco-based video ad network, has launched an online ad exchange for video. 

We caught up with founder and CEO Tod Sacerdoti for an overview on the industry need for a video ad exchange and what his company expects to accomplish. 

We also spoke about re targeted video ads, which he says is extremely efficient.  Earlier this month, BrightRoll announced an alliance with Magnetic for video search retargeting.

Andy Plesser