I think the thing you first notice about it, compared to today's shows, is that it's super informative. There were more facts about chub in the first minute of video 1 than in some whole series of modern angling tv series.
Another great thing this video has is a lack of the egotistical and self-congratulatory "look at me catching big fish" footage that so many modern shows suffer from - often with seedy porn film-style waaa waaa electric guitar music during the fight as the fish are reeled in.
That Robson whatever his name is, is the worst proponent of show off, look at me, uninformative angling tv, but almost all the modern shows suffer from it to a greater or lesser extent in my opinion.
On the minus side for this old video is the extraordinary posh 'n' plummy accent. I genuinely can't understand some of what he says. Did he really say you had to correct the "billets of line"? Or was it "billows"? The vowels are so plummy it's hard to tell!
As above, LOVED the fag break though. Definitely after my own fishing style that!
Some things don't change. I've noticed Matt Hayes' packet of Rothmans accidentally appear in shot a few times during his programmes.