This simple extension adds to Paperclipped a general-purpose video and audio player, a new 'playable' asset type and the radius tags you need to find out whether an asset is playable and to put the player on the page.
<r:assets:each>
<r:assets:if_playable>
<r:assets:player width="400" autoplay="false" allowFullScreen="true" />
<r:assets:if_playable>
</r:assets:each>