It's hard to say what to do without knowing more about your setup but go into Device Manager and tell it to scan for hardware changes. Any built in devices should be picked up and reinstalled. If your camera is connected via USB or something then you'll have to unplug and plug it back in instead. If your camera is part of your laptop then go to the software downloads for the manufacturer. They often provide drivers for the various onboard devices. You can download and reinstall the driver.
As for the video issues and whatnot, you could have a bad camera. I didn't fully understand what actual problem you were having. Irrelevant reinstalling the driver may or may not resolve it. If it doesn't and the camera is built in then you'll need to either get support from the manufacturer or not use it and get an external camera instead. Windows 10 comes with camera software so if it doesn't work in that properly then it is likely the camera is bad.