Americans now watch more than 151 hours of TV a month -- an all-time high -- while those who watch video online consume another 3 hours of video per month, and those who use mobile video watch nearly 4 additional hours per month on mobile phones and other devices, according to a report from Nielsen.

The study also noted that men continue to watch video on mobile phones more than women, and women continue to watch video on the Internet and television more than men.....