Live Notification

Yes, but it would take a bit of custom code.

When a live stream is loaded, the wpYouTubeLiveStarted event is fired; you can use this javascript code to create custom front-end features on your site by adding an event listener:

window.addEventListener('wpYouTubeLiveStarted', function() {
    /* your code here */
    console.log('stream started');
    /* your code here */
});

You’d have to include the [youtube_live fallback_behavior="no_message"] shortcode in a widget or footer so it would be running on every page.

• This reply was modified 6 years, 2 months ago by macbookandrew. Reason: tweak code formatting

It depends on your theme or widget. If I were to build it, I would:

1. Add this to your theme’s javascript file
2. Add a menu item or widget with two <span>s or <div>s, one for “offline” and one for “live”
3. On pageload, hide the “live” one
4. The snippet above will run when a video starts, so in that snippet, hide the “offline” and display the “live” one

Sorry, it’s not particularly user-friendly if you’re not comfortable with a bit of coding.