Controlling Depth of Field

What are the different factors that you can use to control depth of field that this video mentions?  What is one of the primary ways to control depth of field?

    The different factors that we can use to control depth of field mentioned in the video are adjusting your aperture, changing your distance from the subject, and/or changing the focal length. Decreasing the aperture create a shallower depth of field and increasing it creates a deeper one. The distance from your subject can also dictate the depth of field as being closer decreases it whilst being further can increase it. Using a longer focal length decreases the depth of field, so when you're more zoomed in, the shallower your depth of field will be. One of the primary ways to control depth of field is through the aperture as your focal length and distance from subject should be dictated by the framing and composition rather than the deepness of your depth of field.