Nielsen applies a wide variety of methodologies to derive insights from our data, so we’ve taken a more granular look at mobile data from our recent “What Americans Do Online” post.

Video consumption across multiple platforms is now a global phenomenon. Consumers in all regions are proving their insatiable appetite for video information and entertainment – thus far adding screens to their media mix, not replacing them.

More than 10 billion videos were streamed in the U.S. in June 2010, a 1.3% increase over the number of streams last year and nearly a 4% jump over last month’s figures.

“Digital is good for TV,” said Time Warner Chairman and Chief Executive Officer Jeff Bewkes at The Nielsen Company’s Consumer 360 conference today. “TV is not only not dead, but it’s one of the fastest growing businesses. Ratings, time spent and viewership are all up.”

Whether watching a short clip on YouTube or an entire TV program, almost three-quarters (72%) of Internet users view videos online — amounting to 144 million people.

According to The Nielsen Company, mobile Internet traffic in December 2009 was similar to total Internet use, with the largest audiences being seen for search, e-mail and social networking.

Prior to his panel appearance at the 2010 CES, Scott Brown discussed three screen measurement and why TV is really still the ultimate “killer app” when it comes to reaching people.

Given the consistent spike in usage among the three screens of television, Internet and mobile, consumers are clearly adding video platforms to their schedule, rather than replacing them.

The Nielsen Company today reported overall online video usage and top online brands ranked by video streams for October 2009. Year-over-year, unique viewers, total streams, streams per viewer and time per viewer were up, led by a 26 percent growth in total streams.

Time spent viewing video on social networking sites increased 98 percent year-over-year as the number of online video streams viewed on social networking and blog sites increased 45 percent year-over-year.