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[Tag] media:price [Description] The price to download or view the video. Do not use this tag for free videos. The required attribute currency specifies the currency in ISO 4217 format. The required attribute type specifies the purchase option. Allowed values are rent, purchase, package, and subscription. More than one element can be listed (for example, in order to specify various currencies or purchasing options). [Required?] 
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Alternate Markups for Videos   |   Webmasters   |   Google Developers