Yes!  In the search results grid click on the thumb (small) version of the video which will bring up a large video player.  To the right of that in red text is a download link for a 960x540 watermark preview version of the clip.  Note that preview copies are in a very low bit rate (which might show some pixelation in fast moving scenes).  The preview versions are only for editing and review use and not intended for or licensed for final productions.