besides the jingles, do you already know the entire score for the underscoring of the new video? or is it something you will create at a later stage?
the score is done last, after the graphics, final narration, and final jingles are in place. the jingles were written and harmonized exactly during the script writing process, but the score is not written/recorded until everything else is done. it is the last major phase of the process. this is exactly the same process as for history of japan