Change Angles and Perspectives
Try to change point and/or angle of view after every shot. Look for interesting perspectives.
Don't shoot everything from eye level - it's boring.
Especially try shots where you hold your camera close to the ground and shoot up toward your subject. The small size of digital video cameras makes these shots very easy to take.
For example, if you're shooting a scene like people walking on a sidewalk, hold the camera low to show their feet moving, rather than straight-on shots of their faces.
Or if you're shooting someone working at a computer terminal, take one shot from over their shoulder, then another that is a close-up of their hands and fingers using the keyboard and mouse, then a shot from over the person's other shoulder, then a low angle shot looking up at them and then a facial shot.
Or hold your camera above your head to get a different perspective on a scene.
Do a close up shot, because that often provides a more intimate view of a person. This is especially important with video on the Web, because the video viewers use small windows and wide-angle shots won't display much detail.
Don't just rely on zooms to get these different perspectives - move the camera closer or farther away.
If you take shots from these different perspectives, when you edit your video you'll be able to put together a sequence of 4- or 5-second shots of your subject, rather than one 20-second shot from a single perspective.