TV
First of all, a big hello to all our viewers. Hello Mrs. Green, hello Mr. Green, hello Mum. I think that's everyone.
— Eric • Do Not Adjust Your Set

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker opens with a big, formal greeting to the whole audience, then names just a few people, ending with 'hello Mum'. The joke is the gap between a grand broadcast and an audience that seems to be a handful of familiar faces.
Context reviewed