I didn't get to watch the BET Awards show last night, but, based on my Twitter feed, the impression I got from many of you who I follow who were watching, was that the film was being solemnly sold as Roots for this generation, during its segment.
If that's true, OK then BET.
A clip was shown last night, during the BET Awards, or so I hear, but I can't find it online yet; maybe later. What I did find was this new 1-minute TV promo that gives you a little more Kerry Washington and Samuel L. Jackson.
The film won't be out for another 5 months, so I suspect there'll be plenty more TV promo spots, clips, featurettes, etc, between now and then.