For March 2010, the number of unique viewers of online video increased 1.3% year-over-year, from 130.1 million unique viewers in March 2009 to 131.7 million in March 2010.

The number of unique viewers of online video increased 10.5% year-over-year, according to The Nielsen Company, from 127.6 million unique viewers in February 2009 to 141 million in February 2010.

The Nielsen Company today reported overall online video usage and top online brands ranked by video streams for December 2009. Year-over-year, unique viewers, total streams, streams per viewer and time per viewer were up, led by 13 percent growths in time per viewer.