Ostracods are commonly known as seed shrimp.
Ostracod Bloom
According to the photographer's description, at the time of filming, the tank contained 6 guppies, more than 10 rummy-nose tetras, and dozens of cherry shrimp. After trimming the overgrown aquatic plants and changing the water, which likely disturbed the bottom substrate, the ostracods emerged en masse.
Difference between 24 hours before and 24 hours after
