Composed by Jared Emerson-Johnson. All credit goes to him, and to Telltale Games.
A mashup of various patriotic songs, such as Yankee Doodle, Hail to the Chief, and Stars and Stripes Forever. There is one more song in here that is played really beautifully amongst the cacophony, and it is the real reason why I took the time to post this video in the first place. It is done by a trumpet solo (and other brass instruments later on). If anyone happens to know the name of this particular tune, please put it in the comments below. It may just be an original composition from Jared Emerson-Johnson.