To disable the camera on Discord PC, you can follow these steps:
Launch the Discord application on your PC and log in to your account if you haven't already done so.
Click on the "User Settings" icon located in the bottom-left corner of the Discord window. It looks like a gear.
In the User Settings menu, navigate to the left sidebar and click on "Voice & Video" under the "App Settings" section.
On the right side, under the "Video Settings" section, you'll find the option labeled "Camera." Click on the drop-down menu next to it.
In the drop-down menu, select the option "Turn off camera." This will disable your camera during voice and video calls in Discord.
Close the User Settings window.
From now on, whenever you join a voice or video call on Discord, your camera will remain disabled by default. Other participants will not be able to see your video feed.
Please take note that these options are unique to Discord and have no impact on how you use the camera in other programs or generally on your PC. You can return to the "Voice & Video" settings and choose a different camera choice or enable it once more if you wish to re-enable the camera in Discord.