seen in the neighborhood: trucks that search pipes for obstructions using video monitors

From a North Capitol Street NW resident:
                   

I just wanted to mention to Bloomie residents that might not have seen that I've seen on four different occasions and in four different locations trucks that search pipes for obstructions with video monitors. I was wondering, is this being paid for by WASA or by individual residents? Super curious to know if they've found any obstructions that might have contributed to flooding!