This 3 minute YouTube video provides a tutorial on how to tie a basic square knot. It shows step-by-step how to take two lengths of rope or string and tie them together by first making a loop with one piece and then threading the working end of the other piece through the loop and around the standing part before pulling it tight. The finished knot is demonstrated and described as useful for tying packages, bundles, tents, and other items where a simple knot is needed to hold two pieces of material together.