hi domainscorer, i like the design overall. it could use some tweaks. for instance, i think the rss subscription thing should go beneath that square graphic ad. it would look better. also, a little bit of that shade of green goes a long away. i would choose a different color for the post headlines. and you shouldn't have google ads between the headline and the trailer. it would be better to put it at the end of the post.
you'll have a hard time getting a foothold in the crowded movie niche without exclusive content. there are a zillion places to watch movie trailers online (including you tube, where you get your trailers) and most big movie sites that feature trailers include them as part of a larger menu of offerings. you can do other things at comingsoon.net or yahoo.com/movies or any of the other sites besides look at trailers. plus, they have a LOT of trailers and the big sites also get to boast of exclusives from time to time. i don't think a small site offering only youtube trailers has much chance of getting traffic. do you plan to write about movies, too, or offer other features?