Complex sentence: Narrated by Marsalis, who grew-up in New Orleans, bebop--covered in 2 of 10 episodes--paled in comparison to the portrayal of Louis Armstrong over 7 episodes as having been one of the greatest jazz trumpeters ever to live.
Split into simpler sentences: Narrated by Marsalis, who grew-up in New Orleans, coverage of bebop in 2 of 10 episodes paled in comparison to coverage of Louis Armstrong in 7 episodes. Moreover, the documentary portrayed Armstrong as having been one of the greatest jazz trumpeters ever to live.