OBS Studio is a free and open source software for video recording and live streaming.

Features:

• High performance real time video/audio capturing and mixing. Create scenes made up of multiple sources including window captures, images, text, browser windows, webcams, capture cards and more.
• Set up an unlimited number of scenes you can switch between seamlessly via custom transitions.
• Streamlined Settings panel gives you access to a wide array of configuration options to tweak every aspect of your broadcast or recording.
• Modular 'Dock' UI allows you to rearrange the layout exactly as you like. You can even pop out each individual Dock to it's own window.
• OBS supports all your favorite streaming platforms and more.