"Uncle Roger's" accent leans towards Cantonese type to my ears. I'm more familiar with the Cantonese American or Canadian accent, Cantonese Malaysian American, and just a bit with Malaysian Mandarin one (where probably 20-30% of my conversation is in my accented Mandarin). Ng is often a Cantonese based last name though Malaysian might pronounce Ng differently So he might be using a Cantonese style accent via family (are Nigel and Roger typical Malaysian first names?) rather than Hokkien or Teochew. Or the BBC pronounced his last name incorrectly? Still way over the top and exaggerated.

Here's the comedian and chef in the video on BBC together and she doesn't personally cook rice that way, either https://www.youtube.com/watch?v=1dEq9pJbl60 Perhaps there is a huge untapped market for rice cookers and Zojirushi* could make inroads in UK and India. A friend said the instant pot rice cooking method still isn't quite as good as a fuzzy logic rice cooker after trying it out with medium grain rice.

Guessing at accents is a (weird) hobby of mine?

*A friend got a US Balmuda toaster. Don't forget all the lovely Japanese pour over coffee gear.