In this video you will see how to install AntiX Linux 17.3.1.
AntiX Linux is the most lightweight distro that is based on Debian. It's goal is to provide a light but fully functional and flexible free Operating System for both newcomers and experienced user of Linux.
256 MB RAM is recommended minimum for AntiX Linux. So if you have an old machine with limited resourced like 256 MB RAM, it will perfectly fine.
You can download AntiX Linux from https://antixlinux.com/download/