What you can do is export your Google Slide Presentation into PowerPoint.
Then add the PowerPoint to the VideoPsalm agenda.
PowerPoint requirements
In order for VideoPsalm to control a PowerPoint presentation, Microsoft PowerPoint 2010 or higher must be available on your PC.
Notably, VideoPsalm cannot make use of the PowerPoint Viewer or LibreOffice Impress.
If you don't own a Microsoft Office license, install Microsoft Office as a trial and you will be able to use its full features during 30 days for free.
After the expiration of the trial period, you will still be able to use Microsoft Office.
Some features will be disabled.
You will still be able to use PowerPoint, as a viewer, which is great.
Download the MS-Office 1 month trial at Microsoft from their official page, here:
I am afraid it is not possible...
What you can do is export your Google Slide Presentation into PowerPoint.
Then add the PowerPoint to the VideoPsalm agenda.
PowerPoint requirements
In order for VideoPsalm to control a PowerPoint presentation, Microsoft PowerPoint 2010 or higher must be available on your PC.
Notably, VideoPsalm cannot make use of the PowerPoint Viewer or LibreOffice Impress.
If you don't own a Microsoft Office license, install Microsoft Office as a trial and you will be able to use its full features during 30 days for free.
After the expiration of the trial period, you will still be able to use Microsoft Office.
Some features will be disabled.
You will still be able to use PowerPoint, as a viewer, which is great.
Download the MS-Office 1 month trial at Microsoft from their official page, here:
https://www.microsoft.com/en-us/microsoft-365/try