It seems like the verisimilitude of the advertising medium to the product makes for the most innocuous marketing. So trailers are a "friendly" way to advertise

It seems like the verisimilitude of the advertising medium to the product makes for the most innocuous marketing. So trailers are a "friendly" way to advertise films, like chapter extracts are friendly ways to advertise fiction books, or a tasting is a friendly way to advertise wine.