If you know the situation, it's not funny--it's tragic.
Those fish are Asian carp, which are infesting waterways in the lower- to mid-Mississippi river system. They are a horrendous problem, as they choke out native fish species, completely destroying river/lake ecosystems, and make the waters unusable not only for fishing, but also for pleasure boating (for the reasons you see in that video).
The fish were brought to the US by some fish farms to help clean their tanks between generations of the edible fish. However, in the early '90s, some of these farms flooded, and the carp escaped into the Mississippi, where they have become dominant.
They continue to grow northward, and many efforts are underway to try to prevent them from entering the Great Lakes, where it is feared they could push many species of fish and other plants and animals to extinction.
It's definitely no laughing matter.