For the first couple of minutes, I thought she was from the south-east of the UK somewhere, but the longer I listened, the more hints of somewhere further north cropped up. For example, she says "example" with a short "a" in the middle (like "lamp") not the long "a" we use in the south.
I would say she probably grew up somewhere from Birmingham to Manchester but has either lived further south for a long time, or has made a conscious choice to downplay her natural accent a bit for the video.
I'm always intrigued by how languages sounds to non-natives. Her voice is entirely unexceptional so to see it described as "exotic" in post #1 made me laugh a little. Don't get me wrong. It's happened to me too. I said to a Spanish friend that I loved the voice of a Spanish actor in a TV series we were both watching. He laughed and told me that, to a native Spanish speaker, the man sounded very uneducated, rough and scary.
