Netflix function for going back ~5 secs rather than 10

back5.js

function back5() { 
    const goBack10secsButton = document.querySelector('.button-nfplayerBackTen'); 
    const video = document.querySelector('.VideoContainer video')    
    
    // Go back 10 seconds
    goBack10secsButton.click();
    
    // Speed up the video
    video.playbackRate = 10; 
    
    // After 750 ms, resume normal speed
    setTimeout(() => { 
        video.playbackRate = 1; 
    }, 750);
};

// Activate once the 'a' key is pressed
document.addEventListener('keypress', (e) => {
    if (e.key === 'a') back5();
})