Morhpeus is a windows program.

To preview video or audio files, you need to download at least a % of the file before you can preview it. But keep in mind downloading is not necessarily sequential so you might have part of the beginning & part of the middle & part of the end for example.

For previewing on the mac we recommend using VLC - (click on link) _ (choose nearest mirror site) & make it your default video player. We also recommend MPlayer (click on link) for backup.

For audio files, if LW's media player is enabled then LW will use that for previewing. If it's not, then LW will use your default; iTunes for example.