- Enhanced QWebEngineView transparency configuration without desktop bleed-through
- Modified overlay HTML structure to remove container wrapper that was blocking video
- Improved overlay positioning as child widget instead of layout widget
- Added explicit transparent background CSS for HTML and body elements
- Fixed overlay container to ensure no background interferes with video display
- Maintained overlay functionality while allowing video content to be visible underneath

This should resolve the issue where videos were playing but hidden behind the overlay widget.