In this video https://www.youtube.com/watch?v=t6ORxZtcbOI
The author of the video used spectator mode.
Thanks. But still I didn't understand that how he did it out-side of the map.
But spectator mode can not be used to go at side of the map; Spectator mode is used to fit a camera at one place.
That's not true, I think you are talking about changing the camera settings from the console. Check the hyperlink in the answer to learn about original spectator mode.
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