The author has shared a holiday gift to the graph theory community, featuring a video on Euler's formula explained by 3Blue1Brown. The video showcases how planar graph duality can be applied to prove Euler's Characteristic Formula, highlighting the math that underlies graph technology. This video provides a unique perspective on graph theory and its applications in solving problems in new ways. The author encourages viewers to subscribe to the Neo4j YouTube channel for regular updates on graph tech content.