What do we have here?

[grius]

Can this be some kind of a aquatic worm? They stick to the glass, swims in the open or crawling around on furnishing. They are between 0,2-30mm with most around 0,2-10mm. The largest arond 6cm.

At a closer look they look like a light thin bate or earth worm, same body with thicknes under the head and pointy ends,
Sorry for the bad quality

 

[grius]

Here is a better clip.
YouTube - ‪gbhghg‬‏