Message

media:group must have multiple media:content children

Explanation

From the specification [emphasis added]:

<media:group> is a sub-element of <item>. It allows grouping of <media:content> elements that are effectively the same content, yet different representations.  For instance: the same song recorded in both the WAV and MP3 format. It's an optional element that must only be used for this purpose.

Solution

Omit the enclosing <media:group> element in cases where there is only one representation.

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Copyright © 2002-4 Mark Pilgrim and Sam Ruby