The folders /audio and /video contain folders named by bitrate; e.g. /audio/128000.
Each MediaType/Bitrate folder contains Segment files.
Initialization Segments are named "_init.uv?", where ?= a or v depending on audio or video Media Type.
Media Segments are named the integer value of their 'tfdt' BaseMediaDecodeTime.
Media Segment extensions are "*.uvv" or "*.uva" for audio and video respectively.
Media Segments are encrypted using KID=10000000-1000-1000-1000-100000000001
Note that Segments are not stored with prepended 'sidx' boxes, and there is no 'sidx' box contained in the Initialization Segment.
Segments may be renamed with sequential numbers to use a $Number$ MPD template.

The key file is named with the KID in UUID form.  It is a text file containing a character coded representation of the 32byte key.

The MPD uses document relative URLs, so should be located in the parent directory containing ./audio and ./video.
The MPD uses a ./$Bitrate$/$Time$ URL template, and a SegmentTimeline element for deriving the $Time$ values. 

An online server is available to generate and deliver the same Segments here:
http://origintest.cloudapp.net/media/SintelTrailer_Smooth_from_WAME_720p_Main_Profile_CENC/CENC/sintel_trailer-720p.ism/manifest(format=mpd-time-csf)
This MPD uses REST methods to generate the time based MPD and CSF (Common Streaming Format) Segments on demand.