is demon slayer: kimetsu no yaiba episode 16 filler?

Tanjiro and Inosuke are battling Corps members that have been captured in the webs. The two head deeper into the mountain, as they slash the threads while destroying the webs.

The further they go, the thicker the threads become. And those that are being controlled move in ways impossible for a human being.

Trying to stop their moves without hurting them proves to be even more difficult than before, but then Tanjiro makes a certain move…