Discord's Go Live streaming feature is the main one I'm interested in, though video calls would also be useful.

Obviously, this is a monumental task, even one-platform video is hard, let alone cross-platform, so I'm not expecting anything finished right away, more of a holding ticket for the feature. But I think Ripcord could do a much better job than the OG, especially if there was a way to dock a call/stream while in other channels.