When the DVD first started I was thinking that they were going down the wrong path.
As the DVD continued the explanation of the vastness of the known universe was explained in detail. The amount of time to travel from one universe to another was explained in simple easy to understand terms, it was just the magnitude of the distances and time to travel that was mind-blowing. Why would aliens from another universe want to come to earth?
As the DVD drew closer to the end, the careful explanations offered made very comfortable sense.
The DVD is worth every penny for providing a realistic explanation about aliens visiting the earth.