Easter egg: The Office (UK) Series 1 DVD, on disc 2: Go to "Deleted Scenes" and choose "'Slough' by John Betjeman". Before the scene plays, there is a description page with a flickering fluorescent light. The screen will go dim for a few seconds just before the deleted scene begins to play. Press 'enter' or 'play' at this point, and the "Who Cares Wins" video from episode 4 will play.
Easter egg: On the series 1 DVD, allow the main menu to come up on screen. Wait for the menu 'loop' to come to an end. When the menu starts up again, a phone will ring. Press select to get a full length version of 'Free Love Freeway' which was shot for the episode 'Training.'
Christmas Special: Part 1 - S3-E1
Easter egg: Go to the special features and go down to 'If you don't know me by now.' Wait until the photocopier starts copying, then press LEFT.
Answer: In the Christmas specials, David states the documentary crew stitched him up. In other words, he was made to look like an idiot by the way it was put together, but in actuality, he may not have been as bad as the documentary had made out. In addition, it's clear he let his upcoming celebrity status get to his head, something that would not have happened prior to the documentary crew's arrival. At the end of series 1, he mentioned one of his achievements was cutting expenditure without losing any staff.