According to Pastor Chris Oyahilome from the video: “The world is not just a planet; there is also a spiritual region of Earth. The devil and his demons are spirit beings. So the flood dealt with mainly the physical world as it was known then.
“For the second part of the question; I want you to know that there is a dimension of timing. There is a time set when the devil and his demons will be destroyed. The Book of 1 Corinthians 15:26 says the last enemy that shall be destroyed is death. So when this event took place, it wasn’t yet his time”.