increase video speed code example

Example 1: increase video speed html5

document.querySelector('video').playbackRate = 1.25;

Example 2: increase video speed

document.querySelector('video').playbackRate = 1.5

Example 3: increase video speed windows media player

Open your video in Windows Media Player.
Right-click to open the pop-up menu.
Choose Enhancements.
Select “Play speed settings”

refrence: 
https://www.timeatlas.com/speed-up-videos/