yes - tubifex worms to be specific. Some conspiracy-believing geeks claimed that it's a new lifeform. If one worm reacts it causes a chain reaction. I was wrong about the soil part though.
Tubifex:
Tubifex worms do not act like that.
I dare you to provide me ONE photo or video of Tubifex worms acting in the same manner as the first video and looking the same.
The fact is you cant, and neither can any of the experts. Tubifex worms move in unison but also move individually and even in unison only a part of the blob moves, not the whole thing. In my opinion the original blob in the video I posted moves like one muscle. You can also see it has attached itself to the wall with some sort of slim, Tubifex does not do this, Tubifex is a bunch of worms in a ball that still move as individual worms, not one big slime muscle.
Even the photos you posted looks nothing like what is in the video.
The other theory was that it was a Bryozoan, but they dont move as fast and live totally in water.
At the moment, it is unidentified.