There is nothing to read in your previous post. It says nothing other than ''Some people said on my other topic that G-Sync would fix 60fps video stutter problem on 144hz if I had G-Sync.''
There shouldn't be a stutter if you play videos at 60 fps on a 144Hz screen in the first place.
So I'm asking, which problem do you mean? Why should 60fps video stutter on a 144Hz screen?