New US figures from Nielsen reveal that the number of unique viewers of online video increased 1.6% year on year in May 2010.
Viewer numbers grew from 133.7 million unique viewers in May 2009 to 135.9 million in May 2010.
Among the top web brands ranked by unique viewers in May, Google was the fastest growing, up 50.7% on April.
The CollegeHumor Network, CNN Digital Network and Hulu also saw double-digit gains in viewers, said Nielsen, increasing 26.6%, 20.1% and 18.1% month on month, respectively.
April data from comScore claims that 178 million US internet users watched online video during the month, down from 180 million in March.
According to Nielsen’s recent Three Screen Report, US viewers are spending 3 hours and 41 minutes using the internet while watching TV.