Method 1
Whenever you are watching video on YouTube, go to your browser's address bar and insert the word 'kiss' in front of the youtube.com domain name and press 'Enter'.
Example: http://www.kissyoutube.com/watch?v=VKMm4XBsqhk (Video tutorial here)

Method 2
Copy the whole YouTube Video URL (Eg. http://www.youtube.com/watch?v=VKMm4XBsqhk) and paste directly into 'Enter YouTube Video URL' field above and hit the 'Get' button.