Complex sentence: The group reached number one on "Billboard" s Uncharted chart for 17 September 2011 and the music video for "Climbing Walls" reached almost 400,000 YouTube views between August and September.
Split into simpler sentences: The group reached number one on "Billboard" s Uncharted chart for 17 September 2011. As the music video that accompanies the tune reached almost 400,000 YouTube views between August and September.