I've always seen Oasis as an annoying comedy duo rather than a serious band. As a manc myself, its possibly sacrilege but i always preferred Blur. And Suede. And The Bluetones. And most other british acts from that time.
Oasis were not the greatest band in the world.
But they were committed to causing some kind of cultural havoc and they did i suppose, for a couple of years before Be Here Now sank them and killed a treasured era.
I appreciate them more as entertaining museum pieces. So does this film.