I'm surprised there seems to be no clips from the mid-nineties CBBC series 'Out of Tune' online, considering it starred a young James Corden, Jane Danson and Charlie Brooks.
There's quite a good chunk of CBBC and CITV programmes from the 1990s and early 2000s that have faded into obscurity judging from the lack of YouTube clips and discussion of them on the internet.
Although TV programmes are subjective, anecdotal evidence I have picked up over the years points in a direction that the output from CBBC and CITV became less memorable after 1992ish compared with the 'golden' years of the mid 1980s to the early 1990s. Even so there are still some forgotten programmes from the 1980s. Does anybody remember the geography themed gameshow Worldwise on CITV? I think this was another TVS production!