Media RSS can be used in both RSS and ATOM feeds to display media content like images and video.
<media:content>
This tag is used for embedding images and videos in articles. This tag cannot be combined with HTML elements so it must be specified at the item’s root level. Media RSS tags must be specified as immediate children of <item> in RSS or <entry> in ATOM feeds or they will be ignored.
Embedded Image
<media:content url="https://contoso.com/image-source.jpg" type="image/jpeg" medium="image">
<media:title>Image title</media:title>
<media:text>Image1 alt-text</media:text>
<media:credit>Joe Gargery/Fabrikam Images</media:credit>
</media:content>
Embedded Video
<media:content url="https://contoso.com/video.mp4" duration="91" type="video/mp4" medium="video">
<media:title>Video title</media:title>
<media:description>Video abstract/description</media:description>
<media:credit>Joe Gargery/Fabrikam Videos</media:credit>
</media:content>
<media:group>
Galleries can be embedded in articles using the <media:group> tag. This acts as a container for slides tagged as <media:content>
Embedded Slideshow
<media:group>
<media:title>Slideshow title</media:title>
<media:credit role="author">Slideshow author</media:credit>
<media:content url="https://contoso.com/image1.jpg" type="image/jpeg" medium="image">
<media:title>Slide 1 title</media:title>
<media:text>Slide 1 alt-text</media:text>
<media:description>Slide 1 description</media:description>
</media:content>
<media:content url="https://contoso.com/image2.jpg" type="image/jpeg" medium="image">
<media:title>Slide 2 title</media:title>
<media:text>Slide 2 alt-text</media:text>
<media:description>Slide 2 description</media:description>
</media:content>
</media:group