Illustrated with flat minimilist infographics, this existential video by Kurzgesagt - In a Nutshell will make you question your ideals about life. It questions if death is even real by highlighting the fact that on a microscopic level the threshold between dead things and living things are often blurry. They've done videos on a variety of science topics, my favorites are "Why You Are Still Alive", and "Atoms As Big As Mountains".