Question / Help No Video Capture Source Device....... Just Blank

You might try turning off your Avast Antivirus and see if that is it. I think I have seen a post about this.

Turned that off and closed OBS, plugged cam back in and sound picks up just fine. It still does not detect video..

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Windows Settings -> Privacy -> Camera. Make sure "allow apps to use your camera" is enabled, and OBS is shown as enabled under the apps list.

Same for Privacy -> Microphone.
 
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