You reminded me of the flipper zero video game module[0] with it's "video out port" which "transmits a video signal in DVI-D format to an external TV, monitor, or projector".
They are not quite the size of Valve though, and can expect people to figure out what that that port is.
They are not quite the size of Valve though, and can expect people to figure out what that that port is.
0: https://docs.flipper.net/zero/video-game-module