Foot sweeps always kind of look like magic. It seems totally illogical that you could make a large human fall on their backside using such a small part of your body on such a small part of their body, but when done correctly, this technique can really help you get your opponent where you want them.
In this (subtitled!) video, Invisible Jiu-Jitsu‘s David Morcegao demonstrates an easy way to land the Ko Uchi Gari on your opponent. It’s explained so well, even total beginners can understand how to do it. Take a look!