I couldn't find a "WTF" reaction. I am literally WTF-ing this.
1) The music selection contains swearing. This made me second guess watching the video, and your professionalism as a designer.
2) When you faded in, you had the PSD already there. You didn't start with the window that comes up in Photoshop when you start a new image that allows you to define the dimensions of the image. As someone who doesn't do graphics, how am I meant to know how large your image is?
3) There's literally no instructions as to what you're doing.
It looks as though you literally threw this together in 6 minutes, and said: "Yep, I'm done".
My suggestion to you is to show some compassion to your work. When you're working on a guide, you actually need to provide instructions. If not verbally, then by text. Either in the video description or as text within the video.