Backwater

@JennytheTurtle thanks for the info :)

In your video, at 0:41, the swiggly thing on the left is a nematode. 0:45 is also a nematode
1:10 looks like a paramecium. It has heaps of flagella to move around. I hope this helps :)

The worm looking thing in photo 2 and 3 is a rotifer

I don't know. :s

goncola,can you name some of the creatures in there? Paramoecium,amoeba,plankton?

but Gonçalo what exactly is a backwater?

haha this is interesting! looks like it's dancing :)