This 4 minute YouTube video shows a man demonstrating how to tie a basic square knot. He begins by explaining that the square knot is useful for tying two ropes together or attaching ropes to objects. He then clearly shows how to lay the ropes parallel to each other and pass the working ends over and under the standing parts to form the knot. When tightened, the knot forms a symmetrical square shape that holds the ropes securely together.