I am answering this before I am actually seeing the answer in the video, and I believe that Blender uses the RIGHT handed coordinate system. Going into the camera view and rotating it so that the axis are aligned the same way as the picture shown beforehand was very helpful and easily gave me the answer. I think it is a bit odd how the y-axis does not correspond to up as it does in Unity, which I do use. It makes it confusing trying to figure out which direction corresponds to what Unity defines as forward. I basically have to guess and check and keep rotating my model until it faces the right direction! Luckily, I know how to apply rotation.
I want to do my own models with 3d printer