You're right on that score since the 'facts' presented only reflect English footy and a bit about Celtic's 1967 team.
We had players like John Charles, George Best, Denis Law, Tommy Gemmill, Charlton, Moore, Banks, Hurst, Greaves, Mackay and a host of legendary club players. England won the World Cup, and British sides like Spurs, West Ham, Celtic, Man Utd all won European trophies for the first time. As great as they may be, we cannot exclude great players and teams from the whole of the 60s beginning with Real Madrid's stunning 7-3 win at Hampden park in 1960, followed by Eusebio finally leading Benfica to success in 61 and 62. And of course the World Cup of 1962. How can you start an era by omitting a WC I don't know. Where Garrincha was the star, possibly Zagalo and others.
But strange to start from 1963. Nobody starts comparing eras with years ending 2-4, or 6-8. Even 5 is not common but may appear as 1965-1980.
Usually football writers and historians would describe eras in the 2 most common forms:
Year 0-9 like 1960-1969 to describe the 60s
or Year 1-10, that is 1961-1970 also to describe the 60s.
But very odd to begin with 1963 even for English football, because Spurs' 1961 double winning team, the first ever in the 20th century would be omitted. A most glaring omission.
As he did not produce his source, let me reproduce it for clarity:
https://en.wikipedia.org/wiki/Histor...all_in_England
Which is strange way to describe eras, because for football in general, another Wikipedia page uses decades:
https://en.wikipedia.org/wiki/Timeli...ation_football
So how he came by official I don't know, but I guess the only thing right is that he's officially wrong.
Probably better to talk about the eras he's actually watched football on a regular basis. I don't delve much into the 60s because I didn't watch regularly and couldn't (not born) The 70s, still very much a kid, but from the 80s, I could watch, compare, have an opinion and so on. Pele and that 1970 WC and some other players, we can discuss even if we didn't watch much because so many videos and articles exist to document them. But anything before perhaps we had better rely on Oldtimeram and Ramanag amongst others to educate us.