The GraphCast series on the Neo4j YouTube channel offers short, educational videos about graph technology, including a music-inspired series called Graph Karaoke that features songs with graph database Cypher querying around song lyrics. The latest video in this series is "Heartbeat" by The Knife, which has an excellent Sunday groove and is available to watch on the Neo4j YouTube channel, along with other videos in the series featuring popular artists such as The Boss, Michael Jackson, AC/DC, and ABBA.