one streamer creates audio and one streamer creates video to make a combined single stream both streamers broadcast.
i have been doing this for a while with another streamer - he plays sitar with a green screen behind him while i mix a visual presentation stream which he takes to fill his green screen area. the problem with this is our streams do not look the same and our viewers do not know to follow the other streamer unless we suggest it to our viewers and people are more inclined to view his stream as it contains the complete package of his audio and video performance with my visuals whereas my stream has his audio only and only my visuals (minus his video of him performing). also, while he is able to interact with only his viewers vocally, i may only interact via chat and must monitor both chats separately at the same time.
the ideal solution for this would be to allow us to broadcast the same shared stream featuring his audio and visual of him performing with my visuals as the background filling his green screen with a possibility of interacting vocally as needed and combining the the two separate chats into one chat both his and my viewers see and can interact with us and each other.
this would allow us both to gain new followers to each of us and receive equal credit for the combined co-stream.