Automated backups of surveillance footage often group clips into solid RAR files to save disk space.
The native application for .rar files (displays "Solid" in the archive information). video_2018-02-15_03-57-45.rar
A "solid" archive is a specific compression method where all files within the .rar package are treated as one continuous data stream. Automated backups of surveillance footage often group clips
To see what is inside, you will need an extraction tool that supports the RAR format: video_2018-02-15_03-57-45.rar