The fillers after the final fight of Part 1 between Naruto and Sasuke was because the manga had only recently done the time-skip, and the anime needed time to let the story flow, so they created several filler arcs to fill out until they could make the time-skip in the anime, too.
This video is just still funny😄😄 Also people complain about Naruto filler too much. It always felt in universe and was a nice breath of fresh air back in the day😊😊