Laptop internal webcam is lagging. Audio and Video is not synchronized properly
Issue
You have issues with your laptop webcam. It appears the webcam is “laggy” on some conferencing software like Zoom, Microsoft Teams or Whereby. The camera is slow but the audio is fine (lips sync off a few milliseconds).
The issue obviously comes from the webcam as you can notice the lag on your camera feedback in the software.
My personal experience was on a Lenovo X1 Extreme Gen1 20MF but I suppose you could try the same solution on another laptop.
Solutions
Replace the webcam driver by an earlier one
For Lenovo X1 Extreme Gen1, try : https://download.lenovo.com/pccbbs/mobiles/n2ecd06w.exe (V.10.0.17763.20078)
It worked for me. You will have to remember not to upgrade that driver with Lenovo System Update or Lenovo Vantage.
I contacted Lenovo support but they never came back to me why their earlier drivers were causing the issue. They most likely don’t care much about software. I usually receive good support from them which is a disappointment.
BIOS Downgrade (not the solution to my knowledge)
Some people were suggesting a downgrade of the BIOS. I personally DO NOT recommend that.