I'm sorry but I read that and then I looked at the Wiki for Nintendo Directs and it turns out that this is massively misleading. For one most of these Directs where in 2012 and 2013 and the one in 2015 that the guy counted wasn't even called a Mini Direct.Well we will see It'll be interesting.
Between 2012 and 2013 Nintendo was throwing Directs at people left and right. Then he lists a game specific direct mini for Japan in October 2013 which he follows up with a South Korea specific direct for Monster Hunter 2 weeks later, as proof, which is a massive stretch to me.
List of Nintendo Direct presentations - Wikipedia