amateur professional

This is a talk at TED that talks about creative acts by ordinary people who create stuff for their own use.

Source
In this deceptively casual talk, Charles Leadbeater weaves a tight argument that innovation isn't just for professionals anymore. Passionate amateurs, using new tools, are creating products and paradigms that companies can't. He describes the rising role of serious amateurs ("Pro-Ams," as he calls them) through the story of the mountain bike.