Bruji

I want to download trailers for all the movies in my library and link them in dvdpedia. For a while I was using mactubes to quickly download trailers from youtube (just type in movie title+trailer, select download, and move on to the next one). The only problem is that these are very low quality. I was wondering if anyone had a similar process to download trailers at higher quality so that they could be played on a tv. Any help would be greatly appreciated.