TThis is the second episode of the second series of the Snub TV and aired in, ummmm, 1991?
Making their TV debut are a young, cheeky Manic Street Preachers full of piss and vinegar but avoiding eye contact in an endearing adolescent way - "I'd rather never have to do more than 50 (concerts) in my whole life", "We'll never write a love song (or ballad) ever".
Their feature starts at the 11:20 mark. Although it's available elsewhere on t'internet in isolation, I like the context that the whole show provides.
Their peers in the same programme? Dinosaur Jr, Spirea X, Pixies, Darkside, The Scientist and Front Line Assembly.