<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Embedded Video Example</title> <style> .iframe-wrapper position: relative; width: 100%; max-width: 704px; /* optional max width */ padding-top: 78%; /* 550/704 = 0.782 */ overflow: hidden; margin: 0 auto; /* center on page */
.responsive-iframe iframe position: absolute; top: 0; left: 0; width: 100%; height: 100%; Embedded Video Example<
If you want a cleaner, more future‑proof version, you can replace the legacy attributes with CSS and the newer allow / sandbox attributes. .iframe-wrapper position: relative