BTW - Just watched the video. The children did well. However, what was being played was “retreat” (end of work day) and not “to the colors.” On Army installation they play that first followed by “To the Colors” where you are supposed to be at attention and salute just as if you were hearing the National Anthem.
This is an example of “Retreat”:
http://bands.army.mil/music/bugle/retreat.asp
This is an example of “To the Color”:
http://bands.army.mil/music/bugle/tothecolor.asp
Aren’t they sometimes called “Evening Colors”?