These are not youtube videos, but are videos about beekeeping. They are 2 more IWF videos
C 13136 - Selection of Honey Bees - Honey Yield and Behaviour
https://av.tib.eu/media/9233
C 13137 - Selection of Honey Bees - Aiming for Vitality
https://av.tib.eu/media/9234
Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted - Ralph Waldo Emerson