The Igba Boyi apprenticeship scheme, described as the world's largest business incubator, has helped the Nigerian Igbo people build generational wealth in the devastating aftermath of the Civil War.

The scheme involves a master mentoring an apprentice who, upon graduation, is "settled" with start-up funds and contacts to launch their own business.

BBC Reporter Chiagozie Nwonwu explores this vital tradition and why it is now at risk of fading out in modern Nigeria.