I was just looking through the RSS feeds produced by Video module and noticed that it did not appear to support the widely used Media RSS standard properly. It supports the
<enclosure> tag but then duplicates that for a
<media> tag which is not correct as far as I'm aware.
To support MRSS, we need to add the namespace for it (xmlns:media="http://search.yahoo.com/mrss") and use the tags (e.g., media:content) as specified in the specs above.