Unfavorable Semicircle

Unfavorable Semicircle is a defunct 2015 YouTube channel that garnered attention due to the high volume and unusual nature of the published videos, usually featuring distorted audio and graphics.

[1][2] In June 2022, after several years of inactivity, the anonymous creator broke their silence and revealed that the channel was an outsider art project.

[3] In March 2015, a YouTube account with the title Unfavorable Semicircle was created; the channel began uploading large numbers of videos on April 5.

[4] According to computer security specialist Alan Woodward at University of Surrey, it is probably "too complex" to be a numbers station, and is also unlikely to be a recruitment puzzle as those are usually announced in some way.

The videos also seemed to be testing the limits of memory and compression, as it would crash Android phones and Nintendo Switches, and it would also lag on other devices.