OBS guide
Use a Christmas Countdown in OBS
OBS can load the widget URL directly as a browser source. Transparent background mode lets the timer sit over your scene.
Configure the widget
Turn on Transparent background, choose only the units you need, and copy the URL inside the iframe’s src attribute.
Add a Browser source
In OBS Sources, click + → Browser, create a new source, and paste the widget URL into the URL field.
Match the canvas
Set width and height to the space in your scene, then crop or scale the source as needed.