Thank you for answering:
Thanks for the link. It's an entertaining video, and Amy Walker is good on the practical side of accents. However, she got one thing completely wrong : she said that Received Pronunciation is called 'received' because we receive it i.e. nobody speaks in this way naturally (!).That's complete nonsense, unfortunately.
In fact, in this context, 'received' means 'accepted' or 'standard' : as in the phrase 'received wisdom'. And of course there are people who have RP accents as their one and only way of speaking. If parents speak with RP accents, that's how their children speak. I do wish people would check their facts before making videos!
So you weren't convinced by Elizabeth? I confess I was.
Yes, like most actors who work in a second language, Christoph Waltz is convincing when in character, but not as himself. I just watched an interview with him and he does sound slightly German.
So many of your students could pass for natives, if only for a few minutes? Interesting. Is that your superb teaching? Or do you think it's easier for that to happen in the US than in the UK?