Unfortunately the accent on that audio file is strongly US to my ear.

I googled and got “In North-Eastern English dialect, ‘shy bairns get nowt’ is a well-known idiom that essentially translates to ‘shy children get nothing’. Often used to encourage children (or adults) to speak up and have self-confidence”. The original commenter gidorah has a UK email address. https://www.wordsense.eu/shy_bairns_get_nowt/ looked like a reasonable reference.

Edit: here’s it said proper good - skip to 42 minutes: https://m.youtube.com/watch?v=UaErbstVKAQ Aside: The transcript feature on YouTube is amazing but the UX is soooooo frustrating - the feature doesn’t exist on iPad Safari - and the text is not searchable on YouTube iPad App.