speed-up-videos.js

(() => {

const desiredSpeed = 1.5;
const timeToDesiredSpeed = 5 * 60 * 1000; // 3 minutes


const intervalSpeed = 5000;

const intervals = timeToDesiredSpeed / intervalSpeed;

const speedingRate = (desiredSpeed - 1)  / intervals;


const start = new Date();

setInterval(() => {
    const vid = document.querySelector('video');
    const curr = vid.playbackRate;
    const newSpeed = Math.min(desiredSpeed, curr + speedingRate);
    console.info(`Speeding ${curr} -> ${newSpeed}`);
    vid.playbackRate = newSpeed;
}, intervalSpeed);

})()