There is a lot of educated southern British about it. Although his spoken English is very good indeed, there are signs that he is not a native speaker. I think I would have identified him as coming from China, but it's difficult to say for certain. I should have closed my eyes to listen to the clip.
Dear 5jj, thanks for your reply. When you talked about the "signs", what are they actually? Would be appreciated if you could share with us those "signs" so I can learn more from you.