LaCie multimedia hard disks can play back a variety of video formats. While most are supported, partially supported or unsupported video formats can cause odd behavior.
Some video format related problems are:
If any of these behaviors happen, the video needs to be re-encoded. There are serveral free and commercial options to re-encode video. A good resource for tutorials on this subject is http://www.videohelp.com.
NOTE: 3rd party websites are provided as a courtesy, and are not supported by LaCie.