That sounds really delicious!
That formulation is basically the knockoff Lottie's Traditional Barbados-style hot sauce, which is damn tasty and great to smother on a raw burger before going in a hot fry pan or on the grill. I made some "Lottie's" for a friend last year who always brings a few bottles home from one of the Carolinas each year. My version -- based on the link which follows -- was darn close as we compared to the bottled, but Lottie's was still hotter by a click!
I suspect your chef above, worked from this recipe: http://www.pepperfool.com/recipes/hot...
I would suggest that should mangos not be close at hand, canned peaches would be a good substitute.