North Carolina Sewer Monster (Warning Gross)

UPDATE: Reddit user nemutaineko found the answear:

'Creature' A Colony of Worms, Officials Say

         Ed Buchan, environmental coordinator at the Raleigh Public Utilities Department, told the news outlet that staff biologists had confirmed that the oddity was a colony of worms. The colonies attach themselves to roots that slowly work their way into weak points in the pipes.
          Their movement, he suggested, was a response to the heat from the camera's light. "They seem to respond to the light from the camera," Buchan said. "That light is pretty hot."He said the worms live in sewage and pond sediment, but he hadn't seen them in the sewer before."We were surprised. We didn't know immediately what it was," he said.But he added that the worm colonies, bizarre though they may appear, don't pose problems for the city's water quality. "You want to try to keep the pipe as clear as possible regardless of what's in there," Buchan said.
         "On the other hand, it doesn't seem to be causing any blockage."But a biology professor with the North Carolina State University told News14 it might not be a colony of worms but something else."I think it's a colony of bryozoans," Kwak said. "They are small animals like a hydra that live together in colonies, and they stick out tentacles to feed. And when they're disturbed, they withdraw into small tubes that they've built."

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