Ofcourse it will happen. Understand sins first and then satan you will know then why this happens. Lord always have ways which we humans wont understand. Even a true christian will have its faith lacking sometimes. All creatures will undergo several trials and tribulations.
Last thing dont watch,read or heard any of this sort of videos just read the bible and pray that is all is important. This videos and this sort of thing bring only lies which they think it is true. Woe to people who say evil is good and good is evil.