I think the video concept is probably fun & empowerment.
She's showing how the song gives your high energy and hopes and so that's transmitted into a catchy choreography turned global flash mob
The video's also shows global unity because it shows people from different aspects of life having fun dancing, and then of course the final scene with KC (best scene of the video) it's just perfect. There's no bashing in the video, it's just a fun, empowering project.
As for the fact that is cheap, yes it may be, but it's GREAT in every single way, she didn't need millions of dollars to create an over-exaggerated music video (like some other people in the music business), she just needed her voice, her band, a microphone, a few video producing sets and small TV's and the participation of people all around the world dancing to what I believe will be one of the biggest hits of 2012, there ya go, those were my 50 cents.