Good or bad?

[Mhalko]

I’m not sure if these are something I should worry about or if they are good as I haven’t put them into my tank on purpose but they have yet to cause me a problem. Can someone help me ID them please. From looking at the forms I would guess that they’re a type of copepod. Am I correct? Thanks

 

[Mhalko]

Sorry the video didn’t work so here’s some pictures

 

[Auquanut]

It's a little hard to tell from the pictures, but I'd say amphipods. Good for the tank and great fish food.

 

[JasonK84]

Bad pictures but I think I see amphipods. If so they are great