Compression depends on a variety of factors - content, type of frames being used (I-P, I-3/7B-P, etc.). Bit rate vs Distortion curve also has to be considered.

Compression depends on a variety of factors - content, type of frames being used (I-P, I-3/7B-P, etc.). Bit rate vs Distortion curve also has to be considered. PSNR of encoded content is a metric. Click bait without much info.