Because .7z is not natively supported by all operating systems like .zip is, you generally need a third-party tool: How to Split and Join Files with 7zip | How to install 7zip
Most modern videos (MP4, MKV, AVI) are already highly compressed using codecs like H.264 or H.265. video.7z
Unlike a video converter (like Handbrake ), 7-Zip is a tool. Because