Click-to-play embedded videos
Replaces heavy video iframes with a light button that loads the player only when clicked.
Code to copy
// Replace heavy video iframes with a click-to-play placeholder.
document.querySelectorAll('iframe[src]').forEach(function (frame) {
if (!/player|video|embed|youtube|vimeo/i.test(frame.src)) return;
var src = frame.src;
var ph = document.createElement('button');
ph.textContent = 'Click to load video';
ph.style.cssText = 'width:' + (frame.width || 560) + 'px;height:' +
(frame.height || 315) + 'px;max-width:100%;background:#222;color:#fff;' +
'border:0;cursor:pointer;font-size:16px;';
ph.addEventListener('click', function () {
var f = document.createElement('iframe');
f.src = src;
f.width = frame.width || 560;
f.height = frame.height || 315;
f.allow = 'autoplay; fullscreen; picture-in-picture';
ph.replaceWith(f);
});
frame.replaceWith(ph);
});How to use this example
- Copy the code with the button above.
- Install JustZix (2 minutes) and open the extension on the target page.
- Add a new rule matching that page.
- Paste the code into the rule's JavaScript panel and save — it runs on every page visit.
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