ESP32 video player looking TV thing based on Moononournation's Mini Retro TV.
Built a £9 TV-B-Gone to turn off TVs remotely using infrared. Tested it in an electronics store, powered by a Raspberry Pi and servo motor
BATC developed the Portsdown DATV transceiver system, based on a Raspberry Pi. This is also used for ATV Repeaters. This is an SDK.
VMAC is a small board which provides a very flexible Audio and Video Switching Matrix, on-board complete with Video Signal Detect. ATV.