The video brings up circles as a viable shape for honeycomb and then throws the option away since they don't pack. When Bees do in-fact make circles, and the hexagons are a product of fluid dynamics. [1] The cause of the hexagonal shape can also been seen with bubbles and other natural materials self assembling. [2]

[1] https://pubmed.ncbi.nlm.nih.gov/23864500/

[2] http://nautil.us/issue/35/boundaries/why-nature-prefers-hexa...