: An open-source compressed archive format known for high compression ratios using the LZMA algorithm .

: Likely a version number, sequence identifier, or part of a multi-part archive (e.g., part 151 of a larger set). 2. Potential Contents and Origin

: Stands for High Efficiency Video Coding (also known as H.265), a video compression standard that offers better quality at lower bitrates than its predecessor, AVC.

You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. Does 7z compress better than zip? - Microsoft Community Hub

: Files required by Windows or third-party players to play HEVC-encoded videos if the native support is missing.