Noddy - '70s children's show
The popular children's book Noddy by Enid Blyton has been turned into several children's TV programmes, some of which can be found on video streaming sites and torrents. However, this '70s version (simply titled 'Noddy') cannot be found anywhere, with no home video release and no content on the internet, apart from the opening which is available on YouTube. Several episodes were available on YouTube, but were taken down earlier in 2014, likely due to the user getting suspended.
The Noddy Wikipedia page states this stop-motion show ran from 1975 to 1982, but doesn't specify how many episodes or seasons were made. It is possible that only two seasons were made.
UPDATE 30 DECEMBER 2014: Sebvannistel had just said on the comments section of this page that a VHS tape of the programme, "Well Done Noddy ", is available on Amazon! But that's not enough... another VHS tape, "Noddy Goes to Toyland" is available there too! Both videos were released by Channel 5 Video in 1986 (although the description on the latter incorrectly stated as being released by "Copyright Promotions/Stop Frame").
Thanks to Sebvannistel for pointing this out. Now if only someone could upload the episodes from those tapes to YouTube...