The title is specific enough, I guess, but I'm particularly interested in knowing if there are any eli5 like videos or any more professional looking ones.

While trying to explain it to, let's say, co-workers, a guy speaking on a desktop mike with a graph in the background doesn't really seem professional and most people simply don't get convinced if the video it's not all "shiny and all".

Why a video? Because YouTube is mainstream and we all want Ethereum to go mainstream so we must use mainstream channels to explain it to others. I'm aware that it's not all about the little guys jumping on board, since so many big names are hopping on, but awareness is beneficial to all parties regardless.