I found the first one in the scene selections after i made this post. Where might i find the second one? I know i might seem lazy but i really hate looking for easter eggs!! Thanks for any help!
I was very annoyed at this as well. I will share it with everyone since I had to research this topic on a LOTR website. Here is how to do it (from theonering.net site):
To find the trailers, go to the scene selections screen. It is designed as a slot machine with the scenes in the three slot windows. Highlight the yellow left arrow and click, which will display the previous 3 scenes. The left slot window contains a question mark. Click on that window to watch one of the trailers in widescreen, dolby digital 5.1!! For the other, keep clicking the yellow left arrow until you see a red circle with a black (dragon?) in the left slot window. Click on that for the other trailer. They look and sound fantastic.
Or to put it in another way:
Every but 2 scene menus has three scenes in them - the 2 scene menus with only two scenes (7-8 and 15-16) has a LOTR trailer in the final slot!