This video from AWS re:Invent 2023 explores core data modeling concepts for Amazon DynamoDB. Greg Krumm and Akshat Vig discuss key principles for designing efficient schemas that can scale seamlessly. They cover topics like choosing partition keys, using sort keys for hierarchies, implementing single vs. multi-table designs, and optimizing costs through techniques like vertical partitioning and sparse indexes. The presenters provide practical examples of modeling e-commerce data and offer insights on access patterns, Global Secondary Indexes, and other DynamoDB features to build high-performance applications.