New data from Nielsen shows that online video viewing continues to climb. Just-released June data shows that more than 10 billion videos were streamed during the month in the U.S. alone, which is a 1.3% increase over the same period last year and a 4% jump over the previous month.

The average time spent on each video is also up, 3.1% over last June and 2.5% over May. The total number of streams per viewer, however is mixed. It’s slightly down over last year at 0.3% but 3.7% up over the month prior.

And what are all these people watching? YouTube primarily, which is the top brand ranked by both unique viewers and number of streams. Following YouTube in unique viewers for the month of June are Yahoo, Facebook, Microsoft sites, Google and Hulu. The runners up in terms of the number of videos streamed are Hulu, Microsoft sites, Yahoo and ESPN.

From a music-specific standpoint, MTV Networks ranked 8th in videos streamed. Vevo was not listed, but it’s hard to tell how many of YouTube’s streams were Vevo specific based on the way Nielsen laid out the information.