was much less willing to give Liam much credit - and not just part of the songwriting credit when Liam deserved that. (Another account I've read of the songwriting credits that should've been on Columbia said Noel seemed fine when told that Chris Griffiths had added to the instrumental Noel had there, but immediately looked unhappy when told much of it was Liam's work...including, according to that account, the vocal melody, which he'd come up with while rehearsing and while walking onstage because the instrumental was his walkon song, after the rest of the band took the stage and started playing first. Chris later picked out the vocal melody on an acoustic guitar.)
Liam, otoh, raved about Noel's songs. I remember one early interview where Liam said the only songs he needed to hear were Noel's and the Beatles'.
It was Liam who got most of the attention, though - who was the star, getting lots of attention even before Oasis started to become famous. Noel had friends and other people telling him "Your kid brother's a star" as soon as they met or even saw Liam. Even the record label owner who signed them, who didn't have any idea what they sounded like when first seeing them offstage at a Glasgow club where a number of bands would be playing, had immediately found Liam charismatic.
I've read about a number of people close to the band having told Noel he'd have fewer disagreements with Liam if he just gave his kid brother more attention and praise, with Noel responding that he didn't really need to because they were brothers. Noel was the more insecure of the two.
You can see some of that insecurity in that third video with Noel admitting he was wondering how to wear a guitar strap to attract women he found more attractive. In another interview he complained that Liam got the sexier girls while he got the ones who wanted to talk about song lyrics. It's sad to think that Noel might've denied Liam songwriting credit he should've had in part because he was jealous of him, but that seems very possible.
And I can't help wondering how much more they might've achieved if there hadn't been that damn sibling rivalry...