We learnt from this video that God is the one who created all things. God is the Creator of everything that exists. Nothing would ever exist without God permission. God created the entire universe and everything that is inside of it. He created the heavens with all the heavenly beings. He created the earth with everything and every creature that is in it. There is nothing or no one existing in the entire universe without God’s permission.
When God created the devil, he was not created as Satan. He became Satan when he chose to disobey God's commandments. When he exalted himself and wanted to be like God, that was when God cast him away. Demons are the angels who equally disobeyed God's Word like Satan. They were thrown out of heaven. They are the ones existing as demons.
Demons are spirits. They do not die. They are not like humans. So, they do not die or be born. They are the way that they have been since.
Isaiah 14:12-15 (KJV) How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!
For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
I will ascend above the heights of the clouds; I will be like the most High.
Yet thou shalt be brought down to hell, to the sides of the pit.