Anyone over about 25 would likely feel that of all people, big-time YouTubers aren’t exactly in need of a coffee fix: high-octane, breathless excitement and endless, pause free chitchat don’t exactly scream ‘3pm slump’. However, Irish YouTuber Seán McLoughlin, aka Jacksepticeye – who boasts more than 52 million social media followers, and nearly 16 billion views on YouTube alone –...