We can't access the sample you linked to as those IP addresses are private networks which aren't routable on the Internet.
This looks like it could be a problem with the source material. Have a read of
this thread and see if it helps. If you're still having the same issues then please provide a sample of the source video and we can take a further look.
With MediaCache the origin is typically a web server or NAS, not a Wowza vod application. If you have sample.mp4 in the root content folder of your web server, and you have a MediaCacheSource defined with BasePath "http://", which is what the default MediaCacheSource named "dvrorigin" is, then the stream name for playback on the MediaCache edge is:
"dvrorigin" is just the name of the predefined MediaCacheSource in Wowza 4 install, you can rename it or make another one. Since its BasePath is "http://" it can be used to point to any http location. You can make the BasePath more specific, for example "http://[your-web-server]/content. Then the stream name if sample.mp4 is would be