With thanks to Ross Sillifant for the heads up (with KidGameR186496 flagging up on the AtariAge forums), new footage of Dactyl Joust’s intro from the Atari Jaguar has surfaced thanks to The Obscure Media Archive:
How was it found? The Obscure Media Archive reported that their dad was the VP of the art department at High Voltage, and the footage was found whilst clearing out the basement.
It’s a great finding, and hoped that more (including something of the game itself) can be found in the future.