Ok, so that’s not sufficient to interpret. At least once a month, for how many months in a row? How much content duration needs to be watched to qualify as viewing content?The more than 2 billion "active users" number was based on logged-in users viewing content at least once a month.
And most importantly, is one user with multiple Gmail accounts a single active user or multiple users? Given most people likely have more than one Gmail account this would be an easy way to inflate reports.