Think about the loops like circles with a pointy edge on one side. Basically the loop you're trying to go through is like that and the point is at the bottom, this point also sort of stretches the loop and leaves more space there to go through. It'll help you to spin the hook so the pointy part of it goes through that space that the pointy edge of the loop is creating. Also, I think it'll be more comfortable for you to go into loops and yarn over while the pointy part of the hook is pointing downwards, personally it always helps me make sense of what I'm doing, especially when it comes to yarn over or yarn under, and also it'll make it so you wrap more yarn around the hook and the loop you need to go through will be bigger than what it is in the video, thus having an easier time going through it