Remember that any piece of equipment that you add to your system is another piece of equipment that can fail or that will require troubleshooting if it is not working. Depending on the equipment you already have, you may not need any of the below equipment to make quality recordings.
If your laptop has a 720p webcam, a 1080p webcam will be an immediate upgrade in image quality.
Document Cameras are a good way to capture documents or other visual content using your preferred video capture software.
An external microphone can drastically improve your audio quality.