The slurry began hijacking the brains and bodies of its hosts, deranging their minds and cannibalizing their own bones, keratin, and bodily fluids to expand the slurry and its pipe networks.

Fully developed victims would be indoctrinated into the CYNEX AGGREGATE, a centralized hivemind broadcasted by the slurry itself.

So does this "broadcast" have anything to do with the TV STATIC showing up everywhere...? I've been seeing like, FACES and WORDS in it...

Yes, the closer a member of The Cynex is, the stronger their hivemind's broadcast becomes. At a great distance, the signal is only seen when no other signal is present.

But as The Cynex gets closer, the signal dominates all others, and all screens begin projecting live footage of THE SLURRY MOTHERVAT, the source of the CYNEX HIVEMIND.