Small fold-able tripod dolly. To make movies you usually need to move smoothly your camera on a flat surface, like a table or the floor. There are many commercial tripod dollies but you can easily make your own with a few wood boards and three wheels.
These different types of lighting create different gradients and colours of light giving an image more meaning and depth. The way the light is enables the image to be more interesting and direct to what you want for your shoot.