Google for “gooseneck web camera” and you can find several similar products, some with clip-on mounts.
If your computer is a desktop instead of laptop, you can also use a normal camera mount in front of your display.
Either way, you’ve got an annoying mount right in the middle of the screen, which is going to be a real pain if you’re trying to see the screen, not just talk into it.
A year ago, I read an article on IEEE Spectrum’s web site showing how you can make a much nicer teleprompter-style system from some pretty simple and cheap parts.
IEEE Spectrum: How to Look People in the Eye While Videoconferencing
The article cites a YouTube video showing the assembly process:
