Yuu☆Yuu☆Hakusho: Eizou Hakusho II

Eizou Hakusho II actually consists of four separate volumes. Each volume focuses around one of the main characters; Yusuke, Kurama, Hiei, or Kuwabara. Each episode is basically recap about the specific character's involvement in the series.
The beginning of each episode also contains a short music video about the specific character, with a song by its seiyuu.