It’s no surprise that people are using broadband to watch videos when they’re neither at home nor in the office, but now NPD Group has gathered actual data and developed forecasts that prove this is a sharply growing trend.

Its new report divides these video viewers into two categories: nomadic, those using a coffee shop or similar fixed location; and mobile viewers.

By 2015, the nomadic category of users will is expected to reach 154 million, closing in on the predicted 175 million in-home users. Mobile users are also projected to grow, from approximately 6 million at the end of 2010 to 77 million by the end of 2015.

“Over the next few years, broadband video usage will predominantly be driven in the home by Blu-ray players and connected televisions,” said Ross Rubin, executive director of industry analysis at NPD, and co-author of the report. “Handset manufacturers, though, have opportunities to tailor devices and software to the increasing prevalence of video.”

Broadband Video: On Demand, On the Go, and On the Rise is the first Inflection Report from Connected Intelligence, a new service from The NPD Group, which analyzes the confluence of connected devices, access, and content.