Please, just for one moment why don't you actually think critically for yourself instead of just swallowing the same old garbage people have been feeding you since birth.
The premise of the video (at least what I sensed from it) seemed to present the unverifiable narrative that the evil is required to appreciate good. Of course, it didn't say that and went on about Iblis and she fell from the grace of god. (Ironically due to pride but who presents pride better than god and the religious).
We live on a planet that is hostile to our existence. What do I mean by that? I mean that our existence on it is circumstantial. We evolved on this planet much like anything else. What does this have to do with good and evil? I'll tell you below.
Have you ever wondered why people don't do much to actually quench the hunger of the billion or so starving people on this planet? The millions of children dying every year? If you thought greed, correct! Not the hardest question to decipher in the world. However, it isn't that simple. There is enough food in the world to feed 11 billion people and the human population is expected to peak at 9 billion. Why are we so greedy? You may wonder this. There is a very simple and yet profound evolutionary explanation. Greed is how nature works. The animal kingdom is built upon greed and cruelty. We are no different. We are apart of that kingdom.
The early humans were greedy because it aided survival. They were mostly hunter gatherers who lived in small fragile communities and resources were easily depleted. Sharing became hostile to survival. This tendency has been passed on over the generations and it explains perfectly well why humans are so anti sharing, why the animal kingdom is so anti sharing. This reason extends towards the starving children in Africa.
The reason why I explained all this to you is to establish a pretext before spouting claims. Allah created the nature of man and the nature of man is greedy, self centred and narcissistic (of course it's not our only nature). Knowing this, how do you explain the starvation and painful suffering that children go through before dying as a consequence?
It is far more rational and far more simple (going by Ochams razor) to take that simplest and the most rational explanation which is that nature isn't fair and she has a reason for that. To cough out the weak abs give birth to the strong! One cannot rationally reconcile the supposed goodness of a god but the reality of evil of his creation.
Iblees biggest crime... Trying to trick Adam into gaining knowledge. How diabolical! 
All the terrible slander he had to endure for centuries 
