What is Unus Annus & Memento Mori? Markiplier & CrankGameplays’ greatest YouTube experiment of all time.

What is Unus Annus & Memento Mori you’re wondering? Here’s all you need to know about this unique adventure by CrankGameplays & Markiplier! Approx 368 days ago, that’s right a leap year & 2 days, Youtubers Mark & Ethan along…