YOu could find an old


YOu could find an old Videonics MX-1 video mixer, iirc it does chromakey.  I still have one here in the office for the rare "webcast" when I have to mix three cameras… only issue is that it gets hot so people (all three of them) watching online got a nice shot of the Videonics logo when it reset during the


But it is SD.

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