Composition is how you choose to frame the video you're about to capture; and composition is just as important for video as it is for still photography.
Rule of Thirds
One of the most basic composition rules is the Rule of Thirds. When you look through at your subjects, using Live View on the LCD screen, imagine a tic-tac-toe grid over the scene. Notice where these lines intersect. The rule of thirds suggests that these intersection points are the ideal places to position your subject. Doing so will generally result in a pleasant and balanced composition. Try moving your camera so your subject appears where two of the lines meet. The subject doesn’t have to be directly on the intersection but somewhere close to it. Try a couple of different compositions to find the one you like best.
Establishing Shots, Medium Shots, Close-up Shots
When shooting video, you want to vary the types of shots for a more interesting feel. There are three types of shots that you’ll always see in videos and movies from big Hollywood productions to commercials and even wedding or occasion videos.
The Establishing shots are the wide shots. It allows the viewer to take in the entire scene and as an establishing shot is often the first shot in a scene.
Medium Shots can be of a subject (full length or cropped); or a medium shot can be a tighter shot of a scene, that doesn’t include all of the surroundings that a wide or establishing shot.
Close-up shots are tightly cropped shots showing fine detail. Close-up shots can be of a person’s face, an action occurring that is important to the storyline of your movie or simply a tightly cropped shot that shows details of an object.
Where to Crop or Frame a Shot of a Person
Similarly to still photography, you want to make sure when deciding where to crop for shots that show people, that you do it in a way that will make the final footage look pleasing to the eye. Cropping at major joints should be avoided.
For example, If you’re showing a person full length, you don’t want to accidentally crop them at the ankles. Likewise, for a medium shot, don’t crop a person at the knees. Frame your shot just above your subject’s knees. Lets go for a little bit tighter of a shot now, but don’t crop your subject at the wrist, as the viewer will be left wondering where their hands are. Lastly, when framing a tight close-up of a person, you can actually get away with cropping part of their head, so long as their eyes fall on the top line of your imaginary rule of thirds grid.
What is Headroom?
Headroom is the amount of space above your subject’s head in a frame. Too much space isn’t good, so make sure that you’re only leaving a small amount of airy space above your subject’s head.