What Was the Hottest Thing Ever?

The video explores the concept of the hottest things in the universe, starting with the Large Hadron Collider's 2012 experiment that created quark-gluon plasma at 5.5 trillion degrees Celsius. It then discusses the superheated intracluster medium in galaxy clusters, maintained by black holes. Finally, it delves into the Big Bang, where the universe reached temperatures of 10^32 degrees Celsius, known as absolute hot, before cooling down to form the universe as we know it.

How do black holes contribute to the temperature of the intracluster medium in galaxy clusters?

What is meant by 'absolute hot' and how does it compare to 'absolute zero'?