I'm a volunteer for TEDxAmsterdam. A couple of years ago I started because I'm a fan of TEDx and wanted to give something back. For TEDx you're not just a volunteer. You have to apply for it and you get a lot of responsibity's. And it's hard work. But I get so much energy back. It's a terrific job!
Below one of the TED talks from 2016. A sweet one. Raphael Rodan with 'The lion costume'.
(And believe me, to get all the lightbulbs this way was a lot of work)