Abstract: An electronic device is for transmitting a video stream, and is able to be embedded in an autonomous motor vehicle. The electronic device includes a convertor for converting the video stream into a video signal transmissible via a transmission channel and a transmitter configured to send, to a monitoring device outside the vehicle, via the transmission channel, a signal for escalating information including said video signal. The electronic transmission device also includes a timestamper configured to repeatedly produce a timestamping signal including at least one piece of information relative to the production date of said timestamping signal. The information escalation signal includes the timestamping signal.