Well I know this thread is for music, but ive found a simple way of getting the quicktime movie trailers from your Mac/PC to your PS3, its quick and simple (provided you have Quicktime Pro).
1) Select the video you want to convert. Seeing as im using QT pro, ive saved the movies at 1080p so they play at this resolution on my 1080p tv via the PS3.
2) Make sure you have the video window that you want to convert selected.
3) Go to
File/Export... this will load up the options for you to play with, but seeing as the QT files are already MP4, there is not much point in rencoding them.
4) Now with the options for exporting open you will need to select
"Movie to MPEG-4" from the
Export drop down.
5) Now that you have selected
"Movie to MPEG-4" click the options menu at the side, this will bring up the vital options for fine tuning the export, and like I said above since the QT files is basiclay a MP4 file the exporting of it is very fast (around 4/6 seconds on my I-Mac). Choose the same options from in the pic below, this will bypass any re-encoding that would normally take place, and ensure the best quality of the video.
6) Now all that is left is Audio, select the same settings as shown below. This will ensure the best audio too.
7) Save all settings and Expot the file to chosen location, this will export and be ready for transfer to the PS3 via some sort of storage device (I used an I-pod Mini that was windows formated, as mac formated does not work) once files are on your PS3 they will play like any other movie file, and will have a snazzy little clip from the movie as the icon on the XMB.
All setting above worked fine for me, all files were downloaded from the Apple trailers site and converted on an I-mac using QT pro. good luck.
P.S. If any PC/Mac users have any free software ideas that will do the same please post for all to enjoy trailers and other movies on thier PS3's.