Originally Posted by Osb0rne01

what are those?

HEVC
AVC Remux
H256 WEB
H256/4 WEB
X256

HEVC - High Efficiency Video Coding*(HEVC), also known as*H.265*

AVC Remux - AVC is a codec, a remux is a type of release, you can't even compare the two.

H256 WEB - you mean H.265 is a format for 2160p WEB release.

H256/4 - you mean H.264 vs H.265

Both are powerful tools capable of producing high-quality outputs, yet they vary. The main difference between H.265 and H.264 is their compression efficiency. H.265 can achieve up to 50% more compression than H.264, which means that it can transmit the same quality video using less bandwidth or storage. This makes H.265 ideal for high-resolution video formats such as 4K and 8K.

*WEB-DL is*untouched*from source like amazon ,disney+ and WEBRips are encodes from WEB-DL as a direct source.

Sometimes 1080p WEBRip is made from 4K WEB-DL, then it is better than 1080p WEB-DL.