Go to insert, video and video from website
Copy the embed code from a website such as http://www.voki.com/
Paste in the Code
Select Insert and the embeded content will now appear in the PowerPoint.
For years Language teachers have been asking me how they can save their Vokis without having students sign in. This is a great way for students to present work from the web.
Vokis in particular can be used for students to demonstrate understanding, reflecting, learning words and greetings, asking questions, responding and give instructions.