The students in grades 3-6 in our school all have Chromebooks, and the teachers are encouraged to use Google Classroom with their students. In library class, we like to use Google Slides a lot as a repository and showcase of student learning.
For that reason, I was drawn to the link in this lesson for "Adding Audio Files to Google Drive." That link took me to YouTube and more related videos on the topic. I found "Narration Over Google Slides" which shows how to use Snagit to narrate a Google Slides presentation.
I had to use some work-arounds, but here's the end product and the steps I took:
The downside to this method is that I couldn't get Snagit to just capture the presentation. The video image shows my browser windows and the slides navigation bar.