Good video, but how dodgy did that bottom shelf look?! I wouldn't want to be stood anywhere there those tanks!
We have a fantastic pet-shop near us that keeps theirs in a bare bottom tank, and use sponge filters. No heaters, no bright lights, places to hide... They feed a varied diet of live bloodworm/daphnia/earthworms. They also provide a pretty decent care sheet to anyone who buys an axolotl from them.