OBS Studio is a free and open source software for video recording and live streaming. It works on Windows, Mac, and Linux, and has a wide range of features for high performance real time video capturing and streaming.
Jeff Atwood has an excellent blog post, about the increase in computing powers of the modern CPUs and GPUs and the affects of those on things around us. In particular – games such as chess and Go, and password cracking.
Every time you see a new video card release, don’t think “slightly nicer looking games” think “wow, hash cracking and AI just got 2× faster … again!”