Holes on clothes

tvwk2013

I saw video on the youtube . I am doing everything the same, but have a problem. When I activated animation in Unity, shorts are torn. 
The same problem I see in DAZ when turn animation on.
When I change poses in DAZ also appear holes on clothes, but in 1 sec everything goes to normal and clothes puts on correctly.
I spent many hours in solving of this problem, but nothing. Can you tell me where is problem?
Daz 4.10
Unity 201.3.1f1
Genesis 8

SpottedKitty

It isn't holes or tearing, it's something called "pokethrough" — the shape of the clothes doesn't always perfectly match the shape of the figure underneath, and in some poses, bits of the figure will poke through bits of the clothes. Look at the shorts in DAZ|Studio, are there morphs to expand the legs slightly?