1) The premise of the video is that you can use Twitter to send messages to celebrities, who will then ignore you. The implication is that celebrities are rude and that people who message them are pathetic.
But this is not always true. Celebrities will sometimes (even often) reply to their fans, and if they don't it's probably not due to rudeness, but due to THIS
being what the Twitter feed of a celebrity looks like.
2) In the video, I showed some supposed Tweets tweeted by Arnold Schwarzenegger. These weren't taken from his Twitter account but were (I thought) genuine Arnie quotes from interviews and speeches over the years.
At least one of them turns out not to be genuine, according to a YouTube commenter. My fault for not checking thoroughly enough.
3) The Dalai Lama genuinely does have a Twitter feed. Sample tweet: "Damn Blackberry is playing up and have lost a load of messages. Can't believe I reincarnated for this!"
4) The letter to Olivia Newton-John is based on something I dimly remember writing when I was nine or ten; I really did write to her fan club expressing my undying love. She did not write back.
EDIT June 18
Phil Jupitus sent the video to Stephen Fry, who shared it with his fans. A single tweet from Stephen Fry apparently translates into twenty thousand YouTube views at current exchange rates.
EDIT June 24
The video is being tweeted by American celebs now, most prominently Alyssa Milano.
(I had to Google her. She's an actress.)