When viewing thumbnails of media, it's not clear whether any given
thumbnail is from a video clip or a still image until you click
through. It would be nice to signal the media type to users, in a
subtle way.

For example, on Flickr, a little play button appears in the corner
of thumbnails for video clips.
`https://secure.flickr.com/photos/balleyne/sets/72157607569123053/ <https://secure.flickr.com/photos/balleyne/sets/72157607569123053/>`_

Adding a small play icon of sorts to the corner of video thumbnails
seems like a pretty good idea to signal the difference between
photos and videos.

Setup: I have a virtual host for media.macno.org and I use
mod\_proxy to access my mediagoblin server (which listen on
127.0.0.1:6543)

Issue: atom feed self link uses a wrong url

For example requesting
`http://media.macno.org/u/macno/atom/ <http://media.macno.org/u/macno/atom/>`_
returns