Yahoo is acquiring the video advertising platform BrightRoll for $640 million, in a move that could help to offset declines in its traditional display ad business.
Yahoo already runs video ads on properties like Yahoo Screen, but BrightRoll's system gives marketers a way to buy ads in real time across thousands of websites and mobile apps.
"Online video advertising is increasingly fragmented across thousands, if not millions, of sites and mobile apps," the companies said. Advertisers want ways to buy video ads at scale and across many sites in fewer, simpler transactions.
The deal is expected to close by March and will make Yahoo's video advertising platform the largest in the U.S., they said.
Yahoo has struggled to grow its ad business and compete better against Google and Facebook. It may have made some progress lately, reporting in its earnings call last month that its native ads are doing well on mobile.
It's been struggling in the area of traditional display ads on the desktop, however. But it contended Tuesday that video ads are the new display advertising.
"Video is display 2.0," CEO Marissa Mayer said in a post on Tumblr.
"Its what brand advertisers love. Its a format that elegantly and easily transitions from broadcast television to PC to mobile and even to wearables," she said. "This is why video is a key part of our strategy."
It can also replace the branded banner ad, according to Mayer.
Digital video advertising is increasing at "an eye-popping rate," eMarketer said recently, although spending on TV ads still outpaces it.
BrightRoll's revenues are expected to exceed $100 million this year, Yahoo said. The company expects to retain its team of roughly 400 employees.