A very interesting job and audio solutions
In movie production it's called "Foley Work" and that guy would be the "Foley Artist" . High budget films/ Games often make all their sounds from scratch! Seems amazingly time consuming and hard, but if you have the budget, it's a great option. TV shows, and lower budget movies, will often use and re-use pre-recorded elements from the studio library or third party vendor.
Here is another spif vid talking about Foley for a recent StarWars game.
It's a very creative and fun task imo,
although I guess tedious too
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