Tehran protesters call to Obama

Andrew Sullivan posts the following video from Tehran today, showing opposition demonstrators chanting, "Obama, Obama, you're either with us or with them":

Another features the chant (according to TehranBureau's translation), "A Green and blooming Iran doesn't need an Atom Bomb."

As Joshua Kucera notes, these videos seem rather odd given that the Iranian opposition movement has been extremely careful not to identify itself with U.S. foreign policy goals. Opposition leader Mir Hossein Mousavi has also expressed support  for Iran's nuclear enrichment program. Could these marchers have been planted?