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"How do you measure the value of a visitor to your website?  If the visitor is there to watch video, perhaps the most useful metric is the amount of time they spend viewing it before navigating elsewhere.  \nAs it turns out, users who visit videos from Twitter links actually spend the most time watching them, as compared to visitors referred by Facebook or Digg.  According to a study by TubeMogul, Twitter users view a video for 1 minute, 58 seconds on average, versus averages of 1:14 and 0:58 for Facebook and Digg, respectively.\n\n\n\nWhat to conclude from these numbers?  TubeMogul writes:\n\n\u201CDespite Twitter's erstwhile reputation as a soapbox for ephemeral thoughts (i.e. \"long line at Starbucks...argh!\"), the data tells another story: as a platform, Twitter refers among the most engaged video viewers out there.\nOne possible reason for this might be the fact that the service allows one-way following, which means everyone's feed is hyper-customized, with less noise caused by needless \"friend\" reciprocation or, in the case of Digg, a crowded homepage. This way, if someone links to a video from Twitter, there is already a built-in selection bias.\u201D\n\nThat\u2019s all probably true, with the big difference between Twitter and a site like Digg being that links are posted to a highly targeted audience (your followers) as opposed to the community at-large, especially once a story reaches the Digg front page.  \nAs for why Facebook users are less engaged with video, perhaps it\u2019s a result of the news feed being filled with a much wider variety of information than your friend timeline on Twitter, making you more likely to abandon a video quicker and get back to more interesting content.  \nWhy do you think Twitter boasts the best video engagement numbers?  Share your thoughts in the comments."^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2009/07/14/twitter-video-engagement/>