Complex sentence: In February 2007, the company delivered its billionth DVD and began to move away from its original core business model of mailing DVDs by introducing video-on-demand via the Internet.
Split into simpler sentences: In February 2007, the company delivered its billionth DVD. In 2007, the company began to move away from its original core business model of mailing DVDs and introduced video-on-demand via the Internet.