YouTube Gold

Movies Games and Videos complete episode:

Part one

Part two

Part three

Various examples of ITV presentation from 2004
http://www.youtube.com/watch?v=S38CkxxCtz0

Candid Camera Classics
http://www.youtube.com/user/coecludd#grid/user/BC708BCE0A0FA45B

The Krankies Elektronik Komik opening...

http://www.youtube.com/watch?v=s_AKBfzwiVU

The Official Thames TV YouTube 'channel': http://www.youtube.com/user/ThamesTv

My favourite so far is the behind the scenes of Danger Mouse from CBTV: http://www.youtube.com/watch?v=RSv-HXX-EU4

A short Film of an autograph hunter outside Granada Studios in 1977, featuring a lot of Coronation Street personalities of the time....

http://www.youtube.com/watch?v=w3gSB-18hyE&feature=related

Not TV gold as such but there are some very-well done opening sequence mashups on YT:

http://www.youtube.com/watch?v=9VSdF23owh0 - Doctor Who in Buffy style

http://www.youtube.com/watch?v=9EUqwkoPsV0 - Doctor Who in Dallas style

http://www.youtube.com/watch?v=QktVh64BYx4 - Star Trek TNG in Dallas style (Dallas style seems very popular)

http://www.youtube.com/watch?v=lOux5-sI_aY - Doctor Who in Quantum Leap style

BBC Nine O'Clock News on the day of the Challenger explosion in 1986.

Part 1
Part 2

And this is what Danger Mouse sounded like in Slovenian (the first part of the episode is missing):

http://www.youtube.com/watch?v=k-mynUq3ao0

Live and kicking from 1/1/00 with links from BBC2000 show

http://www.youtube.com/watch?v=Uym_a5PIaqw&NR=1

The YouTube channel "filmnet" has uploaded a handful of episodes of End of Part One...

http://www.youtube.com/watch?v=oqWPo5hk3Ac

A clip from BBC World Service Television from January 1993, the days before BBC's Prime and World...
http://www.youtube.com/watch?v=jDbFCZPIz04

Note the COW globe being used alongside the 1991 BBC presentation.