kveaswaran

there are a few video files that some players only play the first few minutes, even when complete. For example, on OS X Quicktime will only play the first few minutes, but a player like VLC will play the whole file.

You can preview (of course) before the file is complete. Preview creates a copy of the file in the incomplete folder to avoid conflicts with the file currently downloading. If the file size of the preview doesn't change between previews, then it might be a linux/lw bug that should be reported.