The setMedia call will need to provide a mpdv key pointing to a
mdp (Media Presentation Description) file.

You also need to require dash.js[1] before initializing jPlayer.

[1] https://github.com/Dash-Industry-Forum/dash.js

The dash.all.js file on the official dashjs.org cdn is version 1.4 which is
2 months old and has a bug which breaks playback in Safari on Yosemite.

This commit replaces it with a freshly compiled version I created from
the development branch of the dash.js project as of commit 8b045c757.