Watch “Heart and Skull Play Example,” a how-to-play guide for Heart and Skull: The Core of Sepulchre from Raven Portents on BoardGameVideo.
Description provided by Raven Portents on YouTube:
This video jumps straight into a 3-player session of Raven Portents' deck builder game Heart and Skull, taking the viewer on a quick first round of play. This video is designed for players who either have a copy of Heart and Skull or who are attending a play session event.
The video explains many of the core mechanics and provides some details around how some of the cards function and interact. This is not an exhaustive tutorial, but it should help a player or group understand how the game works before they dive in.