"OBS is essentially a live video production studio. Multiple scenes, multiple sources, title cards, etc. can all be controlled with OBS on the fly as you stream

"OBS is essentially a live video production studio. Multiple scenes, multiple sources, title cards, etc. can all be controlled with OBS on the fly as you stream." This. And you can have multiple layouts (scenes) and quickly switch between them. It's a video switcher on steroids.