This tutorials shows more different ways of using lights to make the rendered scene more effective.
The first two images are a group spot light rig. By grouping the spot lights the area can have a big sharp brightness or a solid grey softness.
The second two images are showing one of the functions the spot light have which is giving the spot light soft edges and adding a picture to give the scenery more atmosphere. I used the Mona Lisa because I didn't have the image Alan was using in the tutorial video.
The third image is show the uses of area lights.
The final image shows more different uses of point lights.