In the filename, "20" probably indicates ā a quality setting. For h266, CRF 20 is visually lossless to the source, whereas h265 would require CRF 17 for the same result.
VVC is the successor to H.265 (HEVC) and aims to provide roughly 50% better compression at the same visual quality.
If you are looking at a file with this label, you are looking at the . Itās the perfect marriage of a "Big Green" classic and the invisible, high-tech wizardry of modern mathematics.