He clarifies right after that he got to those numbers because he used a lossless vs lossy encoder. Really should've kept reading
No he didn't explain "right after that." He rambled on and on, and even after all of that, he STILL doesn't bring up JPG.
It's an inherently stupid comparison to make. You can't polish a turd.
> This concept of throwing away bits you don't need to save space is called lossy compression. H.264 is a lossy codec - it throws away less important bits and only keeps the important bits.
> PNG is a lossless codec. It means that nothing is thrown away. Bit for bit, the original source image can be recovered from a PNG encoded image.