I noticed you don’t actually have a video dedicated to UPSs which are an important part of any server rack I’d assume.
Stuff like: Eaton vs APC (or other brands?)
Online vs line interactive
Lithium vs Acid battery based UPSs
If a server has a redundant power supply, should you put both power supplies on 2 different batteries? or one on a battery and one on mains?
These are just some questions that I have thought about everytime I think about my UPSs