Playing DRM protected offline videos

[jwold]

Feature description

As a user, I should be able to play DRM protected offline videos.

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Acceptance criteria

This is similar to the Netflix question, coming up with a concept of expiration; videos storable but only good for an artibtrary limit, then ability to renew if DRM approves.

May be two DRM modes, owned vs rent.

Dev note: There is a single API to signal intent to play protected video in browser, and you get data back that unlocks the video for you, and you don't need to know anything about what happens outside of that API

Implementation brief

QA testing instructions

Demo

Changelog entry