This app allows you to convert multiple images and YouTube videos to Google Slides for free. 
Convert/Insert your images and YouTube videos to a single presentation with this app.
You can share this Slides with others directly. Simple and easy to use.

Provides connect with Google Drive. You can directly convert multiple images and YouTube videos to Google Slides in your Drive.
Supported Formats: JPG, PNG, GIF, and YouTube videos...
Supports Chrome, IE10+, Firefox, Safari, Edge...