Hey wow. Even I learned something from it despite mapping for years. I didn't know about the align center texture button. Never exactly understood what that was useful for. Fantastic how you aligned the rail textures. I always aligned such things by hand.
This is actually a really cool video/example map. some of the stuff in here I didn't really know you could do. Would recommend you keep posting stuff like this.
Good, But having chapters, (i.e Fixing Rail Textures) or the teqneiqe being teached would be nice. Also voice (Even Ai!) Would make the video much easier to understand and follow. Have a good day Brother.