Video shot in a matter of hours for a charity duet cover recorded the same day. Old pals Bee & Jay do indeed dance, exuberantly, in the (empty) streets, as well as a derelict building. Bowie lip-syncs a tiny lyric wrong, but that's okay. No need to re-shoot. It's fine. About mid-video, waiting for his next line, Jagger picks up a mystery can off the ground and drinks from it, then does some light grooming.
These men were not only rock stars, but fashion icons. Bowie wears a smart trenchcoat over a snazzy onesie, which has both sleeves and both legs; this isn't Ziggy Stardust, but a refined, established, post-Serious Moonlight, pushing-40 rock icon. Meanwhile, Jagger's white sneakers introduce the video, immediately banishing any doubts you may have had as to the decade it was produced in. He tops his outfit off with a swishy seafoam blouse that could've clothed both him and Bowie.
Not that these two needed a get-along shirt; the onscreen duet is aflame with all the chemistry you'd expect. Their carefree, improvised moves range from jumping to bouncing to hopping to jazz hands to that swoopy arm thing Bowie does a lot (see: Ashes to Ashes) (and then Jagger does it too). These 3 minutes of music history are dense with rewatch value. Enjoy "DitS" with someone you love - just as Bowie and Jagger made it.