1Play is a digital signage system based on the Raspberry Pi (Pi Zero and Pi 1,2, and 3). It supports images, videos, RTSP video streaming, and HTML5 content. The content is pushed from a cloud server. You can also manage all content from a system. This platform is not free but you can try 1Play with a 30-day free trial. If you're interested, you can visit the official website at https://1play.tv/.