[rigelk]

Technically it's to provide an opt-out switch in the interface. It's being developped and will land in the stable.

[jameslk]

This shouldn't be an opt out, it should be the default. Most won't understand the ramifications of not opting out.

[toomuchtodo]

Breaks the distribution and cost model. You either need to join the swarm or pay to watch the video from a CDN. There is a cost to deliver bits, it's just been hidden from you by corporations subsidizing it. Therefore, it can't be default (although a modal could be provided that informed you prior to streaming and gave you the chance to bail out).