CGP Grey is an American educational YouTuber, podcaster, and live streamer based in the United Kingdom who creates explanatory videos on subjects including politics, geography, economics, sociology, history, philosophy, and culture.

In addition to video production, he is known for creating and hosting the podcasts Hello Internet with Brady Haran and Cortex with Myke Hurley.

In January 2014, Grey launched the podcast Hello Internet along with co-host Brady Haran, another educational YouTuber and online content creator.

[‡ 9] The podcast features discussions pertaining to their lives as professional content creators for YouTube, as well as their interests and annoyances.

Typical topics include technology etiquette; movie and TV show reviews; plane accidents; vexillology; futurology; and the differences between Grey's and Haran's personalities and lifestyles.

As a result of their conversations, Haran has been noted for reappropriating the term "freebooting", among other words, to refer to the unauthorized re-hosting of online media.

[28] In 2013, Caitlin Dewey wrote that Grey is regarded as a "celebrity in the niche world of educational YouTube videos.

"[29] According to economist Joshua Gans, "while they may not be names in the halls of academia," YouTubers like Grey "have brought diverse explanations of mathematics, physics, political institutions, and history to millions on the Internet.