Can any believer answer this question?
The assumptions made in this video are incorrect concerning God. God is a being of total free will. It is not that God cannot do evil. It is that he chooses not to do evil and understands that this would destroy all the joy and happiness of his existence if he did. If God chose to do evil, God would cease to be God.
Nobody tells God what to do. He does what he does of his own free will and choice. It is the desire of God that mankind become more like him. Thus giving mankind free choice is essential in mankind's progression to become more like God. God realizes that you cannot become like him by being forced forever to do good. We must learn to choose good over evil continually just as God does.
Mankind, before becoming spirit children of God, existed as self-existent intelligences.
Doctrine and Covenants 93:29
29 Man was also in the beginning with God. Intelligence, or the light of truth, was not created or made, neither indeed can be.
God could not create these intelligences because they are self-existent. They have always existed. God cannot create that which already exists. It just so happens that they are not in a perfect state of being like God is. So for God to bring about perfection in these intelligent beings, he organizes (creates) them to be combined with elements into spirits and then into beings with bodies. He then has to school these beings by giving them free will and teaching them to follow his will which will give them the greatest degree of joy and happiness for all eternity. This earth life is part of that schooling. It is only temporary but can teach a great deal about good verses evil.
Because it is essential for mankind to have free will to become like God, and because mankind is not in a perfected state as God is, evil exists in this temporary mortal world. What ever we experience in this life, that knowledge will rise with us in the resurrection. Even though this life can be painful, it will serve as a good lesson for all eternity.
Matthew 5:48
48 Be ye therefore perfect, even as your Father which is in heaven is perfect.
We are commanded to choose perfection even as our Father in Heaven is perfect.