is attack on titan (shingeki no kyojin) episode 5 filler?

While Eren is running on top of the Wall, the Colossal Titan charges at him, destroying the upper portion of it. Eren sees that the Titan aimed for the cannons, realizing that the gate being destroyed is not a coincidence either - the Colossal Titan is intelligent.

With his omni-directional mobility gear, Eren rushes towards his opponent, while dodging the Titan's slow attack. However, just as Eren is about to strike a fatal blow, the Colossal Titan releases a huge amount of hot steam, slowing Eren down.