Panasonic G80 / G85 - Digital Zoom vs 4K Crop vs Ex-Tele

Panasonic G80 / G85 - Digital Zoom vs 4K Crop vs Ex-Tele Digital zoom, 4K cropped to 1080p, or Ex. Tele Conv.? Which is best? In this side-by-side comparison, I look at the difference in quality between these three methods of increasing the effective focal length of your lens while shooting video.