To tune my ear and learn some vocabulary, I have been using the sentence bank in a language website/app called Glossika. It’s a nice resource and free for Welsh learners (you have to pay for most other languages).
Anyway, to me, the speaker seems to be using a mix of words/phrases from different parts of the country. Has anyone here listened to him, and, if so, what part of Wales do you think he calls home? Just curious.