Complex sentence: The video features the band playing in a cafe/restaurant/bowling alley style location, each band member as well as performing the song (As Motion City Soundtrack) has an alter ego character that appears in the video.
Split into simpler sentences: The video features the band playing in a cafe/restaurant/bowling alley style location. In addition to performing the song as Motion City Soundtrack, each band member has an alter ego character that appears in the video.