Download and install 7-Zip or use the WinZip trial.
is a compressed archive file, typically created using the 7-Zip archiver . While the exact contents depend on who created the file, the naming convention suggests it contains one or more video files . vid009.7z
Because 7z files use high-level lossless compression (LZMA/LZMA2), they cannot be opened natively by older versions of Windows without third-party tools. Download and install 7-Zip or use the WinZip trial
Use The Unarchiver , which is a free tool available in the App Store . vid009.7z
Use apps like 7Z: Zip 7Zip Rar File Manager available on Google Play or iZip .