Optimizing video backgrounds in CSS and JavaScript

Adding video backgrounds to websites using CSS and JavaScript can enhance visual appeal, though it requires careful implementation to avoid performance issues. This tutorial details how to integrate video as a background, specifically focusing on a website’s header, while ensuring responsiveness and interactivity without sacrificing speed. Techniques include using the HTML5 video tag with attributes like muted, autoplay, and loop, and employing CSS for styling and overlays to improve text readability. The guide also explores optimizing video performance using the Intersection Observer API to control playback based on visibility, and discusses selecting appropriate video formats and sizes. Additionally, it suggests alternative uses for video backgrounds, such as for text overlays or sliders, and provides solutions for browser compatibility challenges.