NDI Multiple Display Support

Support Multiple Display with NDI Protocol, it will be very useful for limited screen output computer but with ndi we can do key&fill to another apps for example Resolume
It will be similiar idea that has been available in Easy Worship and Pro Presenter

Apparently NDI support is coming to Presenter later in 2025.

In the meantime, I think there are Mac applications like Deskpad (https://github.com/Stengo/DeskPad?tab=readme-ov-file#readme) and BetterDisplay (https://github.com/waydabber/BetterDisplay#readme) that allow you to create "virtual monitors" for Presenter to output to. These can be captured by applications like OBS and then streamed online or sent over NDI (using the OBS NDI plugin).

I haven't yet investigated Windows utilities that do the same thing, but I'm sure there must be some options out there.

I also haven't discovered a clean solution for getting an alpha channel out of Presenter, but it might be possible to have Presenter generate two separate outputs — one for the fill and one for the alpha/key, and then use something like the StreamFX plugin to combine the two into a semi-transparent video.

Cheers,
Simon