VideoJS / Udemy play videos or movies at custom speed or faster using attribute playbackRate

document.querySelector(".vjs-tech").playbackRate = 4

1. Open the Udemy video course page:

2. Open the Developer tools and here the JavaScript Console.

3. Execute the following code.

Adjustments:

If you want to apply the faster playtime to all videos you could Rapp the command in a timer and refresh it each time a new video is loaded. Therefore use the following:

setInterval(function(){ 
document.querySelector(".vjs-tech").playbackRate = 4
}, 5000);

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