What do you think of the jesus "sun" of god theory?

I was just watching this you tube video a friend sent me a lot of it makes sense but some of it seems kind of iffy to me, so I thought I would ask the collective what they thought about it all ” Ive only watched 1 of 3 ”

http://www.youtube.com/watch?v=BNf-P_5u_Hw

if the link does not work the title is

Zeitgeist [Religion] The Greatest Story Ever Sold (1of 3)

The Theory uses Historical References and History to Prove that the Sun sign of the zodiac and Son of god are the same reference just a Play on words watch the VIDEO ! and you will understand