justice league snyder cut is a director cut of the real movie it self the Zack snyder was the real director of the justice league movie but due to some reason he could not make to work with the last justice league full movie
The Zack snyder said that the movie was not presented in the way he want it to be. He said there are major changes in the movie from his real movie. So he decides to recreate the movie and make it according to his real story.
The new movies has the leanth of almost 4 hours which means the movie might get released in two parts of 2hour each. So you can download the justice league snyder cut full movie in two parts and can watch it as well.