(via https://www.youtube.com/watch?v=l3LtMs6kF3U) 

Ra: Path of the Sun God,

I highly recommend watching this as it is a good visual explanation of Egyptian Mythology that shows the creation myth of Nun, goes into the contendings, and the Barque of Ra’s journey through the underworld. If you have the money consider renting it or buying the dvd from the official website here. The video quality is not the greatest but its the best one on youtube.