Systems, methods, and media for authenticating multiple devices

A method for authentication, the method comprising:

• detecting, by a computing device, a display device that is connected to a same local network as the computing device, wherein the computing device is also associated with a user account and wherein the display device is to be authenticated with the user account on a media service using the computing device;
• causing a user interface element to be presented that, when selected, initiates authentication of the display device to the media service;
• and
• transmitting, from the computing device to the display device, authentication data that causes the display device to retrieve a corresponding authentication token from the media service, wherein the corresponding authentication token authenticates the user account on the display device and grants the display device access to the media service.

A non-transitory computer-readable medium containing computer executable instructions that, when executed by a processor, cause the processor to perform a method for authentication, the method comprising:

• detecting, by a computing device, a display device that is connected to a same local network as the computing device, wherein the computing device is also associated with a user account and wherein the display device is to be authenticated with the user account on a media service using the computing device;
• causing a user interface element to be presented that, when selected, initiates authentication of the display device to the media service;
• and
• transmitting, from the computing device to the display device, authentication data that causes the display device to retrieve a corresponding authentication token from the media service, wherein the corresponding authentication token authenticates the user account on the display device and grants the display device access to the media service.