Despite the fact that, as alluded to in the post title, this stuff is basically marketing for other games, we love it when game music turns up in rhythm games. It may have something to do with the fact that video game music is awesome, especially from companies like Konami that care enough about music to make whole games about it.
This video is from the Japanese PS2 game Dance Dance Revolution Supernova 2 Super DREAM, and features original Time Hollow animation to go along with the game's surprisingly cool theme song. The song sounds vaguely Akira Yamaoka-esque (Yamaoka's works have also appeared in DDR games), though it was composed by Masanori Akita.
