YouTube users now watch 6 billion hours of videos a month

People are now watching more than 6 billion hours of video a month on YouTube, the Google-owned (s GOOG) video service announced on its blog Wednesday afternoon. That’s  twice as much as just a year ago: In May 2012, YouTube announced that its viewers were watching three billion hours of videos a month. In August, that number had grown to four billion hours.

From the announcement blog post:

“We recently announced that YouTube hit an incredible milestone of 1 billion unique monthly visitors, connecting 15 percent of the planet to the videos they love. And those global fan communities are watching more than 6 billion hours of video each month on YouTube; almost an hour a month for every person on Earth and 50 percent more this year than last.”

Less than two months ago, YouTube announced that its site now gets frequented by more than one billion unique visitors a month.

YouTube announced the new milestone in conjunction with the Newfronts in New York, where various online video services are showing new shows to advertisers.