I remember receiving this video ad for a Chevy pickup truck in a print issue of Popular Mechanics circa 2015 [0]. When disassembled, it consisted of a screen, battery, speaker, and circuit board. What the article doesn't say is that the circuit board had a micro-USB port which when connected to a computer mounted the internal storage as a drive, with the four-or-so videos it played accessible. I actually managed to find an existing home video video with the correct format (I wasn't familiar with FFmpeg at the time) and when one of the internal videos was replaced with mine (with the same filename), it would play instead. I believe the micro-USB also charged the internal LiPo battery as well, as I don't recall being worried too much about battery life. I probably still have the thing somewhere! [0] https://www.tubefilter.com/2015/04/16/chevrolet-video-ads-in...