How to add a timer in Google Slides via YouTube Google Slides does not have its own timer feature, therefore, we have to use third-party tools and YouTube is one of the best options.

You can add a timer to your Google Slides presentation by inserting a YouTube video into each slide.

One way to do this is by adding snow to a PowerPoint slide. The article How to make it snow in PowerPoint offers a basic snow plan that uses the same shape and random timing effects.