This trailer seems like a compilation of footage from various songs, if the previous trailers were any indication. Saw bits of at least three other songs in it. When it was not directly from the songs, it was with the wardrobe in them, which leads one to believe that we just might have to wait for bits from Tu Bole Main Boloon as it appears in the film. All trailers can be downloaded from the official film website, jaanetu.com.
Here is a video of A. R. Rahman singing the tune live.