The Operations Room channel on YouTube has been killing it for a while now. Their top-down, animated videos show some of the most important battles and events in history. I've learned a ton about events in World War 2, Vietnam, the Gulf war, and even interesting isolated events. Their latest video, on the battle of Alligator Creek at Guadalcanal, is fascinating and I've linked it below. This is definitely a channel to follow; there's lots of terrific content.