Firstly: with your posts Arlen: give some fucking context. We cannot read minds of other people. We don't know what you are referring to.
Secondly: Generally every (EVERY) video of the EEVBlog will have a video here. If you have a question relating to a specific video, find the thread for that video (it isn't hard to do) and post it under that thread.
Relating to the topic at hand:
Those double adapters: Hopefully he will destroy the things. Those things are actually ILLEGAL to use in Australia. The reason is simple: Every circuit from mains is protected via a circuit protection device (generally a combination Circuit Breaker/Residual Current Device) which protects the circuit and things attached to it. Each circuit is protected up to a certain load, which is generally the maximum load that individual circuit can cope with, with the number of outlets giving a rule of thumb as to the circuit breaker size.
What those double adapters do is allow the user to plug in more devices into a socket, then the circuit is designed to cover. The obvious case and point for example is in a kitchen. If a kitchen only has a single powerpoint for a fridge, and a double for the rest of the kitchen, protected by a single 20A socket. Assuming in the morning you wake up, grab something out of the fridge (5A), throw it into the microwave (10A), chuck the toaster on (10A) and then boil the kettle (10A)...can you see where I am going here? Thus the reason they aren't legal.
I know what you are thinking: What about those power strip boards? If you look at them, you will these days see a "Reset" button. That's because they have some circuit protection in them, which will protect the outputs and wiring.
-kizzap