Windows 7 Tip: 
AuthorSTREAM Desktop is a Microsoft PowerPoint add-in, which searches and inserts YouTube videos and images from Microsoft Bing search results in PPT slides. It installs as a “ribbon” in PowerPoint and provides a search box option, which can be used to search images and videos. These can then be easily inserted in slides while creating a presentation, without the need of opening a browser.
See Also: How to embed a Sound file into PowerPoint
The add-in also provides an “insert by URL” option, which fetches the specified image or video for easy insertion in PPT slides. After a presentation has been created, it can be uploaded online to authorSTREAM, which plays it as a “slideshow mashup” and provides multiple sharing features.
Download AuthorStream Desktop Powerpoint
Really useful tutorial , Thanks for sharing , keep it up