Once a Novel Idea, Now a Must in the L.A. Times states, "No one makes definitive claims that videos increase sales, but publishers and booksellers agree they can help," which sounds a little contradictory to me.
I'm loving this idea, though. Think about it--authors singing, dancing, bumping and grinding in skimpy clothes. Walking down mean streets looking p.o.ed. Videos may not move books, but they could be seriously entertaining.
Ah, thank you artsJournal.