For when OBS is easier/faster and good enough.

Other use cases: The vanilla shaders for spectating mobs are not seen when rendering a replay, but OBS would be an acceptable workaround with the UI hidden. If the fix for this is to allow vanilla UI elements to be toggled like they are during gameplay, being able to open the inventory and record that with OBS while playing a camera path would be a fun feature to add to a mining timelapse.