Avoiding any of the cheap, crappy junk cameras from the Chinese import bargain bin - Here are three quality cameras at a low price between - USD.All are 720p HD cams that will perform well even on older, slower CPUs.
Look for smart, thoughtful design in the camera itself: A webcam clip and mounting design that's versatile and adjustable when perched atop or clipped to a laptop or notebook screen, that can sit on your desktop or monitor, or those that have a standard camera mount hole for attaching to a tripod.
For MOST people a simple, hassle-free, futz-free fixed lens cam may be your best straight-forward choice.
Native, driverless OS-level web cam support is now built into Mac OSX El Capitan, Yosemite, Mavericks, Lion, Leopard & Tiger, Windows 10, 7 and 8, Vista and XP Service Pack 2 or 3, and all modern Linux distros.
Here are three simple camera choices - all UVC compliant - from Logitech.
However adjustable cams and are useful for primarily two reasons: 1.