Videos from the 2020 Radon Campaign in Belgium:
FR: https://afcn.fgov.be/fr or https://youtu.be/5g48NcnayX8
DE: https://fank.fgov.be/de or https://youtu.be/qPyKc_Vepp0
NL : https://fanc.fgov.be/nl or https://youtu.be/pIpZn014jWE
Video from the UK Radon Association