Prager U, which is not an accredited university, has produced really good material that is very timely for the day after the bombing at the Arianna Grande concert. The video is a serious of short clips about Extremism and features several Muslims speaking out against Extremism. Please watch the entire thing. (You can pause after each speaker which averages about 7-10 minutes.)

https://youtu.be/CQnerEsgJgE