Some trailers won't play in the MB2 "MB Trailers" plug-in. There are two types of .mov files, the .mov files that play all have their video and audio details listed in Windows 7 explorer, e.g. video length, frame width, frame height, data rate, total bitrate, frame rate etc. The .mov files that won't play all have no video and audio details and will only play in iTunes/Quicktime. I read that MCE only plays MPEG4 .mov files so I'm guessing the .mov files that won't play arn't MPEG4. Any idea what format they are or how I can find out? Is there a codec pack that let's you install only what you need without having to install all the rest? or is there another solution? For more info and a screen shot see my previouse topic in the old forum about this issue. http://community.mediabrowser.tv/permalinks/14192/mb-trailers-won-t-play-mov-files-with-missing-length-info