gecko-dev/content/media/test/dash
..
dash-manifest-garbled-webm.mpd
dash-manifest-garbled.mpd
dash-manifest-sjs.mpd
dash-manifest.mpd
dash-webm-audio-128k.webm
dash-webm-video-320x180.webm
dash-webm-video-428x240.webm
garbled.webm