Details
Description
Steps to reproduce:
1. Create a QML file with WebEngineView playing Youtube video
2. Set property `audioMuted` of WebEngineView to `true`
3. Run the QML file with qmlscene
Expected results:
Video playback is muted
Actual results:
Video playback is not muted
Settings `audioMuted` to `true` at `Component.onCompleted` also doesn't work
Settings `audioMuted` to `true` at `onLoadingChanged` works