Linux is always been the collection of useful CLi tools and ffmpeg is one of the known video audio managing tool.
SCP also known as Secure copy protocol.
SCP is known for securely transferring computer files between a local host and a remote host or between two remote hosts. It is based on the Secure Shell (SSH) protocol.
SSH, also known as Secure Socket Shell, is a network protocol that provides administrators with a secure way to access a remote computer.
Unix: Unix is a family of multitasking, multi-user computer operating systems that derive from the original AT&T Unix, development starting in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.