Learn how to create a like button functionality using JavaScript in this comprehensive tutorial video. Discover the process of implementing a feature similar to Instagram's like system for images and posts. Follow along as the instructor guides you through HTML structure, SVG integration for like and dislike icons, JavaScript implementation, API data retrieval, app rendering, random image generation, adding and removing favorites, and CSS styling. Gain valuable insights into building interactive elements for social media-style applications or any project requiring favorite marking functionality.