Google has introduced a new feature that lets you insert and play Google Drive videos in Google Slides, in addition to videos from YouTube. To insert your video, navigate to the toolbar and select Insert > Video. You will have three options for adding a video: YouTube, URL, and Google Drive. Click on the Google Drive option and choose your video.
After your video is added to your presentation, you can:
To view these actions, right-click on the video and select Video options.
If someone doesn’t have permission to view a video embedded in your presentation, they will be be prompted to request access to the video.
Note: While you can play Drive videos in Slides on the web and mobile, you can only insert them from the web application. For more details, visit the Help Center.