The laptop webcam does not display any live video in the example below. I have tried webcams from many different laptop models all with the same issue. I don't see any errors other than failed to stop capture when closing the component below. The webcam works fine in versions less than PySide 6.5.  I have test this on a X1 Carbon Yoga Gen6, HP 840 G3. 

import QtMultimedia
import QtQuick
import QtQuick.Controls

Item {
    anchors.fill: parent
    CaptureSession {
        camera: Camera { id: camera }
        videoOutput: videoOutput
    }
    VideoOutput {
        id: videoOutput
        anchors.fill: parent
    }
}