The Life of Python - 20 Greatest Monty Python Sketches
http://gnews.com/entertainment/The-Life-of-Python-20-Greatest-Monty-Python-Sketches-110424014489.html
The Holy Grail of Python’s 20 most hilarious sketches, celebrating their 40th anniversary.Streaming: Monty Python Puts Free Videos Online, Sells 23,000% More DVDs
Like it says in the title.
Monty Python started a YouTube channel with tons of their sketches streaming for free. They included links to their DVDs at Amazon. The result was a whopping 23,000% increase in sales.