After searching Thingiverse and other sites, I couldn't find a fast and lightweight camera mount suitable for my Logitech C615 and C920, so I designed one myself. This mount prints in under an hour at 60mm/s.

Update 4/04/25
Updated with V2 that has a slightly thicker camera base to increase overall strength.

The hole size is designed for the most common camera mounting threads, 1/4"-20 UNC, with a 6.34mm diameter, providing a slight grip for a secure fit. Standard 1/4" threads are 6.35mm in diameter, so this design allows for better hold.

This uses just 8g of material, costing approximately $0.15, and was printed in PLA.
Recommend print at 0.3mm height with tree support 10+ infill
Print 0.1mm on the screw - 50+ infill