Tom made this video challenging you to try his tongue twister, to help raise money for a horrible skin diesease that is affecting many people. The fundraiser is for Sohana's Research Fund, which raises money for the condition which is called an Epidermolysis Bullosa.
So, if you can, donate (use the online link he provides!) Otherwise, site back and enjoy listening to Tom read his tongue twister....I know I could listen to his voice reading pretty much anything. They should sell audio books of him reading; I'm sure they'd sell SO many copies!!