I can’t see who has the item that was dropped. The zoomed out video is not clear, and people are in the way. The item definitely did not come from inside the pant leg, it was dropped and hit her on the way down.
Go to Video #3. start the video. Click on full screen (little box in right hand lower corner). It is very clear that it came from her right pants leg and drops to the ground. It looks and sounds like a shiny metal foley clip. her leg is clearly visible and the person to her right has moved to give you an unobstructed view.