This is the second video in the Service Worker Playlist.
This video is focused on explaining the Cache API which lets developers control when and how to save files in a origin-based cache.
Code from video: https://gist.github.com/prof3ssorSt3v3/ec11c6dfd64e7700b2918b3a52f4ddd4
MDN reference for Cache: https://developer.mozilla.org/en-US/docs/Web/API/Cache
Images used in video: https://picsum.photos/id/1011/5472/3648
https://picsum.photos/id/1016/3844/2563
Full Service Worker playlist: https://www.youtube.com/watch?v=NJRu3pmmN-4&list=PLyuRouwmQCjl4iJgjH3i61tkqauM-NTGj