File _patchinfo of Package patchinfo.6821

<patchinfo incident="6821">
  <issue tracker="bnc" id="1041794" />
  <category>recommended</category>
  <rating>moderate</rating>
  <packager>plater</packager>
  <summary>Recommended update for ffmpeg</summary>
  <description>This update for ffmpeg fixes the following issue:
    
* Browsers would fail play some online videos by selecting H264 over webm (boo#1041794)
  </description>
</patchinfo>