Do be careful, the like 20–50€ USB webcams that you can usually find are absolute dogshit IME and probably blown away by any webcam on a good recent laptop (the one I have certainly is by the one on my MacBook and IIRC the laptop I had before also had a better camera). Personally I wouldn’t trust any of the ones I can see listed on amazon right now. A lot of times they have horrible autofocus, brightness adjustment, noise and so on even if the theoretical image resolution is advertised as 1080p for example. (Of course, you can always send it back but still.)
If you want actually good quality, get a real video camera that you can connect to a computer, or if possible use your phone back camera if it’s good enough (I know Macs can use the iPhone camera as a built in thing, not sure about other combinations of phone/computer).