Experimenting with using iOS streams
Removed some details in MediaObject

iOS (including Apple TV) don’t like it when the Media Object has
video_codec, audio_codec and protocol set, as key=
HTTPLiveStreamURL(url=URL) already sets them.

Removing them caused the streams to start working on all devices I
tested it on.
Removed superfluous attributes

Stripped out attributes that were commented out and not needed.
Merge branch 'use-iOS-streams'