https://www.pcgamer.com/everything-you-need-to-know-about-video-encoding/

A new generation of video encoders is upon us! Some sound familiar, such as H.265, some sound exotic and new, like VP9 or AV1, but no matter what, you’ll likely be tripping over one or the other soon, and cursing that your CPU use has shot through the roof.

Why do we need a raft of new encoders? Why has your hardware acceleration stopped working? Is that 4K file going to play on your 4K UHDTV? What about HDR on the PC? How can you encode your own video, and can you even enjoy some GPGPU acceleration, too? Can we make it all simple for your perplexed brain?