Greasy Fork

your mute was also not working for me. Didn't follow your logic exactly, but tweaked it to something similar that works for me

setInterval(function(){
var adCountdown = document.querySelector('.ad-countdown__remaining-time')
var muteButton = document.querySelector('button.playback-button[aria-label="Mute Sound"]')
var unmuteButton = document.querySelector('button.playback-button[aria-label="Unmute Sound"]')

if(adCountdown === null & unmuteButton != null){
unmuteButton.click()
}
if(adCountdown != null & muteButton != null){
muteButton.click()
}
}, 1000)

I'm guessing they updated their player and the old code just didn't make sense anymore. I just posted your update. Thanks!