YouTube CEO Susan Wojcicki is stepping down from her post, she announced in an email sent to employees that YouTube posted publicly on Thursday. Wojcicki has been at Google for nearly 25 years but will be stepping back to “start a new chapter focused on my family, health, and personal projects I’m passionate about.” Neal Mohan, currently YouTube’s chief product officer, will be taking over as head of the video streaming service. After serving as Google’s senior vice president of display and video ads for many years, Mohan joined YouTube in 2015 and has been one of Wojcicki’s primary lieutenants...