Justin.tv, the largest online community for people to broadcast, watch and interact around live video, has become a top five online video site, according to Quantcast.

Based on global network traffic, Justin.tv attracts 41.4 million monthly unique visitors, more than Hulu (28.1 million) and Veoh (22.5 million). In addition, according to Google Analytics, Justin.tv’s year-over-year traffic has grown by 1,800 percent.

Following are the current Quantcast metrics for Justin.tv (as of March 25, 2009):

• 41.4 million monthly unique visitors
• 412 million monthly page views
• 751 million monthly impressions (embeds + page views)

“Live video is far more engaging than clip video, which is why we’ve seen such tremendous growth in the past year. Ultimately, we’re giving our users a more valuable experience, so we expect to grow even more in 2009 and beyond.” said Michael Seibel, CEO of Justin.tv.

With more than 428,000 channels broadcasting live video and 1.75 million hours of video watched per day, Justin.tv is also leading the growing trend of engagement around online video. When looking at the most discussed video of all time on YouTube, the rate at which viewers engaged through text comments, video responses and ratings was only one in five.