Remember the colors (green, white, red) are just a guideline. You can use any color.
The function of the color is to attract Italian audience to see episodes on YouTube about South Africa.
So exotic could work as well. An African stylistic element can work maybe? You're the experts.
Some inspirations?
https://www.google.com/search?q=south+african+art&client=firefox-a&hs=nsL&rls=org.mozilla:en-US:official&channel=fflb&source=lnms&tbm=isch&sa=X&ei=yth4Urj2E7Gy7AbJ8IGIAw&ved=0CAkQ_AUoAQ&biw=1494&bih=1139