1MathematicsThe lowest common multiple of the denominators of several vulgar fractions.
2derogatoryThe level of the least discriminating audience or consumer group:they were accused of pandering to the lowest common denominator of public taste...
So they flood their publications or channels with what would appeal to the lowest common denominator among their target consumers.
Therefore, what is usually done has a tendency to cater to the lowest common denominator in the audience.
This movie locates the lowest common denominator in the average audience then aims far, far below them.