Very tiny brown worm

[SWnewbie]

Need help identifying this tiny brown worm. I was doing my usual visual inspection when I got home from work and noticed this new little guy climbing a rock. In the tank under the blue light it showed more as white in color which is how I spotted it. The attached video shows how it moves and really how small it is. So far it's the only one I have seen in the tank. Not sure if I should adopt it or evict it

 

[WheatToast]

The video is pretty blurry, but the worm appears to be a Dorvilleidae worm, which is a somewhat common hitchhiker and algae grazer.

 

[SWnewbie]

Thank you and sorry it's so small my camera has a hard time with it lol. I've spotted another two and they all seem to be making their way up the rocks towards the light. I took another pic and some videos, hopefully these help confirm what they are.

With that - just wanted to confirm if they are potentially unwanted critters or more likely new CUC members? If they are algae eaters then they are more than welcome to make themselves at home. Thank you!