0:29 Guy in vest walking with color in front, leaving black and white behind. I think this symbolizes "progress".
0:32 Guy in green tank top drops trash(or maybe knowledge, since it was some type of publication) and the space behind him turns black and white.
0:50 Guy picks up trash, leaving color behind.
Who knows?
RE: (Now Playing on Dtube) Inverted Reality - Media Rolled-Out Main Child Actors From Parkland School Shooting Event Made Foreboding Movie Trailer In June 2017