Some of the shorts have been found

In summer 2019 Archive.org user CBEEBIES Master 2002-2008 CBBC Master 1985-2008 has uploaded the shorts, Hot Cooker, Cleaning Materials, Rivers and Throwing, they may be more on the way if he has anymore Hot Cooker https://archive.org/details/cbeebiesbesafewiththetweenieshotcooker Throwing https://archive.org/details/cbeebiesbesafewiththetweeniesthrowing Cleaning Materials https://archive.org/details/cbeebiesbesafewiththetweeniescleaningmaterials River https://archive.org/details/cbeebiesbesafewiththetweeniesriver