Bulk Import » History » Version 5
You can search and import videos from youtube for keyword you specify.
Bulk Import allow you to Embed or Download video.
Videos are served from youtube. Video played in youtube player. No bandwidth consumed as videos are served from youtube.
Disadvantage of Embed method is, if the video get deleted or sharing disabled for the video, the video will not work on your web site.
Video get downloaded to your server. Video played in your flash player. Video served from your server, so it consumes bandwidth and storage space.