Basing a film or a television series on a real-life event or person, especially one when there's extensive footage of them, is always a tricky thing - especially when you can easily check things on YouTube to see how real it is.

However, it's only when you see them against one another - as in, synced together - that you see just how much detail goes into it. The Crown has won accolades and acclaim for its attention to detail, but when you see just how close it is to real life, it's pretty incredible.

Take a look.