And for what it's worth, I think he is Scottish, and the Scottish have lost their d@mned minds over there. All of Britain has, and Ireland too!
I’d never noticed it until you pointed it out, and am unconcerned about it. Find it out for yourself instead of pretending you can demand it of me or others. The best approach may be to post the question in the thread associated with the very first video where he started to use it. It’s also possible that he explains it in that video.