this screenshot : 
TOP INSIDE MISSING POINTS .jpg
Is my cylinder in blender the cap top is missing lines
that are in the youtube video here is this screenshot:
TOP INSIDE MISSING POINTS 2.jpg

Here is the youtube video screenshot with lines:
TOP INSIDE POINTS LINES PRESENT .jpg
here is the screenshot of my cylinder
no lines : 
TOP INSIDE MISSING POINTS no lines .jpg

The screenshot :
DISPLACED INSIDE .jpg
is my cylinder displaced outside but also displaced inside which should be smooth since vertex group is assigned to external surface with displaced image coords UV.