Video_2021-.7z -

: Because video files (MP4, MKV) are already highly compressed, you may see limited size reduction unless there are many redundant or identical files in the archive.

While it can significantly improve compression ratios, it has specific trade-offs for video files: How it Works video_2021-.7z

if you want the absolute smallest file size for long-term storage and plan to extract the entire archive at once. : Because video files (MP4, MKV) are already

The in a .7z archive (like your video_2021-.7z ) is a compression method that treats multiple files as a single, continuous data block rather than individual items. : Because video files (MP4