OBS
Getting Hologramu into OBS — as a window or as a camera.
Window capture
TODO: Write out the steps for OBS on Linux (PipeWire/xcomposite) and Windows, including which capture method can do transparency.
As a camera
On Linux: turn on the virtual camera and pick it in OBS as a video capture device.
Audio
The app's audio (soundboard, processed voice, videos) goes out through Hologramu's audio output — capture it in OBS as application audio, or use the virtual microphone.
TODO: Name the concrete OBS sources.