How do you play Dungeons & Dragons?

Dungeons & Dragons is celebrating its 50th birthday.

First released in the US in 1974, more than 50 million people have played Dungeons & Dragons since then, making it one of the most popular role-playing games in the world.

Over the last 50 years it has gone through lots of changes and has even inspired popular TV series, movies and video games.

Professional D&D player Jasper William Cartwright explains how to play Dungeons & Dragons.