Learn how to build PoseDance, a TikTok trainer application, in this engaging conference talk from JSNation Live 2020. Discover the process of leveraging PoseNet technology to map body motion, create skeleton overlays on videos, and compare dance moves using webcam input. Explore the integration of Azure functions for user authentication and PlayFab as a game-friendly backend for score tracking and leaderboard creation. Gain insights into the technical aspects of the project, including dependencies, embedding, posing, drawing, and scoring mechanisms. Delve into discussions on accessibility, body diversity, and potential applications beyond dance training. Follow along as the speaker demonstrates the finished product and addresses common challenges in implementation.