I'vent seen any such feature, but what you can do is rely on other technique like SharePoint Usage Report
http://blogs.technet.com/b/praveenh/archive/2010/11/02/usage-reporting-in-sharepoint-wss-or-moss.aspx you can start with.
configure the site usage report, it is basically done at site collection level. Generally it is fixed for the monthly basis, means you can get the data for last 30 days.
Here you can get all the data like number of times doc viewedd?, video viewed
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