The latest report from ratings firm Nielsen reveals that the number of web and mobile video viewers is up, and the time spent watching video on the internet is increasing. But the overwhelming majority of video is still viewed on a television. And Americans are watching more TV than ever.

About 131 million people are watching an average of three hours of video per month via the Internet, according to Nielsen's data. That's up from 116 million watching a monthly average of two hours this same time last year. Additionally, about 13 million mobile phone subscribers—up 52 percent from nearly 9 million last year—report watching an average of 3.5 hours of video a month on a mobile phone (time measurements are not available from Q1 last year).