Built-in Webcam Resolution Not Good - Do I Need An External Webcam?

System: Windows 10 Home 64 bit, version 1909 buiild 18363.900
Laptop: HP 17-by1xxx
Webcam: Built-in HP Webcam; driver is Realtek DMFT-RGB

The resolution of the built-in webcam is not very good. I will be doing some online teaching and I really need better resolution than the built-in webcam seems to provide. I have updated the above driver; resolution did not improve.

(1) Is there any way I can increase the resolution?
(2) Would different webcam driver software make a difference?
(3) If the answers to #1 and #2 is "no", should I purchase an external Webcam that connects via USB3.0?
(4) If the answer to #3 is "yes", what should I look for when purchasing the web cam?

Thank you.

 

I should also add that when I launch the Camera app, here are the best resolutions that I can set:
Photo 0.3MP 4:3 (640x480)
Video 480p 4:3 30fps

 

I've found this, based on your supplied info: https://support.hp.com/us-en/document/c06519036#en_ww-display_sub
It seems there is both a VGA and HD webcam option for your laptop and yours is the VGA option. You will need an HD camera for HD resolution. No driver will make the hardware better.