BreadTube or LeftTube is a loose and informal group of online personalities who create video content, including video essays and livestreams, from socialist, social democratic, communist, anarchist, and other left-wing perspectives. BreadTube creators generally post videos on YouTube that are discussed on other online platforms, such as Reddit.

The New York Times author Kevin Roose wrote that BreadTube creators employ a method he calls "algorithmic hijacking". This method involves them choosing to focus on the same topics discussed by content creators with right-wing politics, as a means for enabling their videos to be recommended to the same audiences consuming right-wing or far-right videos, thereby exposing a wider audience to their perspectives.

Many BreadTube content creators are crowdfunded, and their channels often serve as introductions to left-wing politics for young viewers.

BreadTube creators align with collectivist modes of governance, while opposing the alt-right and far-right. Infighting is common within the BreadTube community, which has been attributed to "the community hosting a spectrum of beliefs, ranging from Social Democratic to Maoist".