Neighbours are torturing us tenants with pounding walls ceiling floors etc Do cops need to observe the noise themselves?

neighbours are demons and stop noise when cops show up. so even with video evidence, do they not need to observe the noise as its occurring?
Update: They cant observe the racket on video?
Update 2: No their drunks, on Sunday women was so drunk she was pounding on another neighbours door, and the neighbour wasn't home.
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