How do I have multiple "versions" of my stream

I would like to broadcast a 2d friendly version of saved broadcast.

The full information is on a 2560x720 broadcast, and is composed of a left eye and right eye of 1280x720.

The obvious stream I want is either left eye alone or right eye alone. Also I can compress horizontally for 3d TV in side by half mode. Finally, I know how to make a monochromized Red and Cyan broadcast.

I read version 30 has '"multi format streaming." How do I do that? I have 50 Mb/s outbound. I have a 2018 Mac Mini Intel and a 2022 Mac Mini M2 basic.

I don't know how to activate that feature.

Do I need more than one Twitch account? If so, how do I unite their chats?
 
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