1) No one films in portrait mode anymore, and the internet has voted that those who do should be eliminated from the gene pool. You don't want to offend the internet, do you?
2) Camera is a bit too far away, but here's my best estimate:
3) You're setting up with the bar a bit too close. Yes your hips are high (A LITTLE BIT). Also, you're not dragging the bar against your legs. Which is wrong. Read the proper pulling from the floor discussion / set up. Deadlift starting Position Critique
4) You are not going to explode and die.
5) The intent / explanation for deadlifts has been written about extensively in the book Starting Strength: Basic Barbell Training. It is currently in the 3rd edition and we recommend that you read it sometime.