I do NOT teach space but I am a huge fan of Col. Hadfield and his adventures in space on the International Space Station (ISS).
These 2 minute videos may inspire the next generation's interest in space and provide an easy filler when needed.
1. Col. Hadfield brushes teeth in space:
https://m.youtube.com/watch?v=3bCoGC532p8&feature=kp
2. Tears in space. https://m.youtube.com/watch?v=P36xhtpw0Lg
3. Washing hair in space: https://m.youtube.com/watch?v=kOIj7AgonHM
4. Sleeping in space. https://m.youtube.com/watch?v=UyFYgeE32f0
5. A look inside the ISS https://www.youtube.com/watch?v=3kVxk6Drm2I
6. Brushing teeth in space https://www.youtube.com/watch?v=3bCoGC532p8&feature=kp&app=desktop