This screw-holding screwdriver has a split blade which expands to hold the screw in place.
https://www.youtube.com/watch?v=gJYCiT2taCA
Previously:
https://www.homemadetools.net/forum/...440#post122381
https://www.homemadetools.net/forum/...128#post100813
https://www.homemadetools.net/forum/...102#post100747
https://www.homemadetools.net/forum/...021#post125400