if you need quick access to individual videos without waiting for the whole set to process. Does 7z compress better than zip? - Microsoft Community Hub
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. video_2021-.7z
While it can significantly improve compression ratios, it has specific trade-offs for video files: How it Works if you need quick access to individual videos
: All uncompressed files are concatenated and processed together. This allows the algorithm to find similarities across different files. video_2021-.7z