LutheranSatire is another great Youtube channel. Their video on how Mormonism is literally just Satan's lazy repackaging of Islam, in particular, is a masterpiece, as is their classic on St. Patrick's bad Trinity analogies:

https://youtube.com/watch?v=w7bukaRhbI0 [Embed]

https://youtube.com/watch?v=KQLfgaUoQCw [Embed]