Quicktime
From Jon's Wiki
Apple are a shower of bastards who don't want you to download their trailers. Here's a shell script to do it anyway:
#!/bin/sh
APPLEBULLSHIT='QuickTime/7.6.2 (qtver=7.6.2;os=Windows NT 5.1Service Pack 3)'
URL=$1
TMPFILE="/tmp/yoinktrailer-`date +%Y%m%d-%H%M%S`"
wget -U "$APPLEBULLSHIT" -q -O $TMPFILE $URL
TRAILER=`strings $TMPFILE|grep '.mov$'|head -1`
TRAILERURL="`dirname $URL`/$TRAILER"
wget -U "$APPLEBULLSHIT" -O $TRAILER $TRAILERURL \
&& touch $TRAILER && rm $TMPFILE
Then you just enter this at the command line:
yoink http://movies.apple.com/movies/independent/capitalismalovestory/capitalismalovestory-tlr1_1080p.mov
Right-click and copy the link URL from Apple trailers.