OBS Studio

OBS Studio (Open Broadcaster Software) is the absolute, unquestioned, and colossally dominant apex predator of the "Live Streaming and Video Production" industry. It is a wildly disruptive, fiercely independent Open Source project that completely annihilated the multi-thousand dollar barrier to entry for live broadcasting. If a Twitch streamer has 10 viewers or 100,000 viewers, they are almost certainly using OBS. The absolute core superpower of OBS is its "Infinite Extensibility and Zero Cost." It allows a creator to build incredibly complex 'Scenes' (mixing webcam, gameplay, browser windows, and green screens) and push that video feed directly to Twitch or YouTube. Because it is open-source, developers have built thousands of plugins for it, allowing it to do everything from advanced audio ducking to controlling studio lights via MIDI. Because it is 100% free, fiercely reliable, and mathematically the most widely used streaming engine on planet Earth, it is the inescapable, absolute standard for video game streamers, podcasters, and corporate webinar producers.