Live Forever features footage of gigs, fragments of music videos (some of which were quite clever), and a lot of interview footage. Damon Albarn (dressed in workman's overalls in a grungy pub) comes across as protesting a bit too much, Liam Gallagher comes across as an idiot, Noel Gallagher's somewhat more savvy though a bit egotistical, and Jarvis Cocker (in his glasses and velvet suit) seems like quite a clever guy. Then there's Louise Wener from Sleeper (who comes across as quite intelligent), Robert "3D" Del Naja of Massive Attack (interviewed at the beginning, middle and end of the movement of which they weren't a part, with their music dubbed over footage of driving at night), James Brown (of lad mag Loaded), Damien Hirst (filmed reclining on a Union Jack bedspread!), John Savage, and Wonderwall, the Oasis cover band, seen overdoing the laddism with pints and fags all round.
If you missed this documentary, it's playing again (I think it's next weekend). I strongly recommend seeing it.