Identification help in first ever jar.

This is a video of my first ever ecosphere. Day 3 of a completely closed off 10oz jar filled with a random scoop of muck from a Midwest retention pond. I was hoping to get some help on identifying a few of the many creatures in it.

There’s plenty of what I assume are Daphnia. However, I also see some very thin worms dancing like grass. My research points to some sort of nematodes but I have no clue. There are also a few mosquito larvae looking things and slug moving thing I focus on in the very beginning outside of the water.

Any help on identifying these creatures, tips, and other observations would be great!