1. Find a good camera. An 8 megapixel phone camera or better will get the job done well.
2. Pick a location with good lighting: outside, a room with many windows, or a room with many lights. Avoid dark rooms or rooms with a single light source. The camera man/woman should have their back to the main light source.
3. Pick a location with no distracting sound. Check the sound quality if using a phone. You may need to attach a microphone if the sound quality is not adequate.
4. Get a good angle. You should probably place the camera at or above shoulder height. Use a tripod. For a stationary video, a good shot typically has the character's shoulders near the middle and their waist or knees at the bottom.