Jerky is not the same as biltong.
Jerkey is cut into very thin strips then marinated in something very sweet (BBQ style things most popular but chilli etc also work great)
you then hang it over a smokey camp fire for a few hours until ready.
Biltong is cut into larger thicker strips, marinated in first salt then vinegar for a while (quick dip to a few hours depending on taste/quality of meat) then rubbed in flavouring and air cured somewhere warm and dry. Unless you live somewhere warm and dry (not the UK) don’t just hang it over a branch. Flies with land on it lay eggs you will eat them then be sick all over your bedroom like in that film.
A biltong box is like an inverted grow box.