449cabcb_asters_______Google_Developers__Required_
[Tag] media:player [Description] You must specify at least one of or the url attribute in . A URL pointing to a player for a specific video. Usually this is the information in the src element of an tag and should not be the same as the content of the tag. [Required?] 
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Alternate Markups for Videos   |   Webmasters   |   Google Developers