"There are so many video-clips on YouTube that I would like to embed in PowerPoint Presentations to enhance teaching and learning"

"I'm lucky that my learning  provider doesn't block YouTube so, is there a way I can do this? I'm using Office 2007"

There is indeed, just follow the steps below...

• Open PowerPoint as normal and move to the slide in which you want to embed the YouTube Video.
   
• You will need to access the Developer Tab...
  • If it isn't visible...
    Click the Office Button...
    
    At the bottom of the menu that appears click the PowerPoint Options Button...
    
    Make sure that there is a green tick in the check-box against Show Developer tab in the Ribbon
    
    Click the OK Button
  • If it is visible, continue...
    
    
• Select the Developer Tab
   
  
• Click on the More Controls icon...
  
• In the dialog box that appears Scroll down and select Shockwave Flash Object
  
  Click OK
   
• Use the cursor, that will change to cross-wires, to click-n-drag a rectangle in which you want the video to appear...
  
• Right-click the resulting rectangle with the cross and select Properties from the menu that appears...
  
• In the Properties window that appears, locate the Movie Field and paste in the URL of the movie you wish to embed...
  
   
• Carefully remove the watch? text and replace the = with a /
  
  
   
• Close the Properties Window (there isn't an OK button just click the small cross in the Properties window header
• Show the slide as usual
  
• The video will, assuming you are online and YouTube isn't blocked at the venue, will appear and can be played...