YouTube: default 1.5x speed
Automatically sets every YouTube video to 1.5x speed, including after navigating to the next clip.
Code to copy
// YouTube: start every video at 1.5x speed automatically.
var SPEED = 1.5;
function setSpeed() {
var v = document.querySelector('video');
if (v && v.playbackRate !== SPEED && v.readyState > 0) {
try { v.playbackRate = SPEED; } catch (e) {}
}
}
setSpeed();
setInterval(setSpeed, 1000);
// YouTube swaps videos without a full reload — catch SPA navigation.
window.addEventListener('yt-navigate-finish', setSpeed);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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