The video tutorial explains promise chaining in JavaScript, focusing on handling asynchronous tasks using .then and .catch methods. It demonstrates how to chain multiple .then calls to process resolved values and handle errors with .catch. The tutorial also covers returning values from .then and .catch, showing how these values can be accessed in subsequent .then calls. The video concludes with a brief mention of addressing callback hell in the next video.

What new insight or understanding did you gain from this video?