During the video it showed people with birthdefects and airplanes crashing. This isn't the abscence of a God but, the presence of a Satan. People always tend to look over the fact that the opposite of God is satan.
Meaning the opposite of good is bad.

It was also said that God left no evidence that he was here but, besides the fact that this world was made and is still here after millions of years, besides the fact that people don't go around and water the trees around the world to keep them alive; besides the fact that there is nothing holding the stars in the sky.

god left his holyspirit. he gave us evidence of the holyspirit by allowing us to speak in other tongues as the the holyghost gives the evidence.

I don't know about you but, I guess I'll look like a fool for christ. Even if God don't show enough "evidence" of himself for you.