Yes, we can insert a video from the device and also from online to a presentation. Follow the below step to insert a video:

• Open the file and go to that slide where you want to insert a video.
• Navigate to the Insert tab in menu bar. You will see a Video option at the end of the Insert menu; click on it.
• You will get two options: This Device and Online Videos. Choose one of the options to insert a video either from the device or online.
• Click on the Online Videos that will open a window where copy and paste a link of the video and click on the Insert button give below and add the video to the slide.
• You can provide the link of the video either from the YouTube, Facebook, or any other video sit