Aurora R10 Ryzen, does it have a built in camera app?

In addition to what @Anonymous posted ...

Webcam companies also sometimes provide a more full-featured app themselves (to be used with their hardware).

4k webcams are units like the GO PRO 9 and a USB3 to HDMI interface.

https://www.youtube.com/watch?v=Um5k2fl8g8w

Gopro as Webcam
https://www.youtube.com/watch?v=1pFyjFhinIs

Open Broadcaster Software
https://obsproject.com/

OBS Studio requires some additional files (Visual C++ 2017 Redistributables)

https://obsproject.com/visual-studio-2017-runtimes-64-bit

https://www.amazon.com/dp/B08BRT5QYX/

Interface tp GO PRO 9 via HDMI

There's different ways you could go about it.  You can get an all in one webcam, that's usually simple and straightforward.  They will have their own software and drivers that you can download to run with the webcam, or you can use the generic microsoft stuff included with win 10.  Another approach is to get a DSLR or other camera, and then use it as a webcam.  This is usually much costlier, and also requires a lot of separate purchases - the camera, an A/C adapter for the camera, a video capture card, an HDMI to micro HDMI cable, a mini-camera stand, and a standalone microphone.  As a caveat, if you do go that route, be careful with the video capture card.  There are a number of $20 to $50 units out there that are simply no good.  They will advertise 4K but the max resolution / fps you'll be able to squeeze out of them are substantially truncated from the advertised rate.  Which defeats the purpose of using a $1K camera to end up getting the video quality of a $30 Microsoft webcam.  Then, there's the sound issue as you may need a standalone camera to record sound (even if your DSLR has a built in mic).  

Follow up - the elgato is a good video capture card, but you pay a huge premium for the quality.