change the “.mute-unmute” button and “.video-hero” video selectors depending on your setup.
document.querySelector('.mute-unmute').addEventListener('click', toggleMute);
document.addEventListener('keydown', function(event) {
if (event.key === 'm' || event.key === 'M') {
toggleMute();
}
});
function toggleMute() {
var video = document.querySelector('.video-hero');
video.muted = !video.muted;
}