Complex sentence: Davis will tour with Thornton's "Boxmasters" across the United States in the summer of 2008, including TV appearances, and he filmed a video for the first single, which is currently airing on GAC and CMT.
Split into simpler sentences: Davis will tour with Thornton's "Boxmasters" across the United States in the summer of 2008, including TV appearances. He participated in the filming of the video for the first single, which is currently airing on GAC and CMT.