Mandelbrot Zoom: How large would this get?

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Suppose you were to watch this video on a 27 inch, 16:9 screen; full-screened:

https://www.youtube.com/watch?v=FhRZsBabXHk

If the video was able to expand past the border of your screen (The zoom retains it's constant size through out the video, pic related) just how big would the final image resulting be?