How to 2 material texture in 1 sphere mesh?

Hello, I’m new with UE4 and I have a problem while I’m texturing my material. This is the screenshot

I’m having this problem while i was following a youtube tutorial. This is the link of the tutorial.

I put my material just like the tutorial on 6:56, but it doesn't work well like it should be. So I'm a little bit confuse, because I don't know which part I miss. The material that I'm using never blend together like in the video. Please help and sorry for the super simple question.

Have you used a mesh with two spheres (an inner and outer sphere)?

You don’t need 2 spheres. just put this on the default sphere.