The Manual lists the elements of an online video citation:
YouTube video:
“IBM's Watson Wins Person of the Year at the 15th Annual Webby Awards,” YouTube video, 2:47, posted by "TheWebbyAwards," June 13,
2011, http://www.youtube.com/watch?v=makDyycHvmw&feature=fvhl.
Video, with a principle subject, from an online source other than YouTube:
John Harwood, “The Pros and Cons of Biden,” New York Times video, 2:00, August 23, 2008, http://video.on.nytimes.com/
?fr_story=a425c9aca92f51bd19f2a621fd93b5e266507191.
Citations in a bibliography are formulated in a similar way to a footnote or endnote, but do have slight variations from the way a footnote or endnote is formulated.
YouTube video:
“IBM's Watson Wins
Person of the Year at the 15th Annual Webby Awards.” YouTube video, 2:47. Posted by
"TheWebbyAwards," June 13, 2011. http://www.youtube.com/watch?v=makDyycHvmw&feature=fvhl.
Video, with a principle subject, from an online source other than YouTube:
Harwood, John. “The
Pros and Cons of Biden.” New York
Times video, 2:00. August 23, 2008. http://video.on.nytimes.com/
?fr_story=a425c9aca92f51bd19f2a621fd93b5e266507191.