One point perspective is a technique in drawing where all lines that are parallel in the real world converge to a single vanishing point on the horizon, giving the impression of depth. This video tutorial demonstrates how to draw a simple room using one point perspective by first establishing the horizon line and then drawing parallel lines that recede towards the vanishing point to create the illusion of depth and distance on a flat surface. The finished drawing shows a basic room with a table and chair drawn using one point perspective to make it appear three-dimensional.