Once the movie starts, you'll see two identical images side-by-side. You must go into your device's 3D settings and select "Side-by-Side" mode to merge them into a single 3D image.

, here is a summary and the technical details for that specific format. Movie Summary

Experience the final stand at Hogwarts like never before. While many fans have seen the epic conclusion to the Harry Potter saga, viewing it in 3D Side-by-Side (SBS)