The Village

The Village, an awarded short animation by Mark Baker, United Kingdom (1993)
I recall a British documentary set in a village all in turmoil over two newcomers, an elderly couple, who dared to erect an ugly, unusually high wall around their house.
The villagers were interviewed, one by one, each explaining the fatality of the blow that the wall caused to their community as a whole. They all agreed: the new couple hiding behind that suspect wall is up to no good, no good at all!  
And the more the villagers spoke, the more they let slip... tiny snippets demonstrating that they climbed, and drilled a loophole into, that wall to pry and spy.
The couple living behind the wall never showed themselves, or their house.