Complex sentence: He released the online mixtape, "Young Boss Vol.1" through the website, it was downloaded over 20,000 times directly from his own website, which crashed the Web server in its first hour of being available for download.
Split into simpler sentences: He released the online mixtape, "Young Boss Vol.1" through the official website. The mixtape was downloaded over 20,000 times and crashed the Web server in its first hour of being available for download.