There are many camera options, however the three most common types are Webcam (good), Smartphone (better), and Mirrorless/DSLR Camera (best).
For webcams, in almost all cases you will want to have an external webcam such as a Logitech C920 series camera. Built in webcams tend to provide low quality.
Smartphones can be used directly with the recording platform (an app may be required) or connected directly to your computer.
Mirrorless/DSLR Cameras can provide professional level quality, however require more technical assistance to set up.