From what I can tell, it is the original clutch, and so it's got around 105,000 miles on it!
I wouldn't be surprised if the rest of the parts are also original, so I was planning on changing the clutch slave cylinder and greasing the gear linkage in the first instance, and just hope that any internal parts have still got some life left in them!
This may sound a very stupid question, but looking at the video you posted(very helpful by the way)... do the brake system and clutch system share a fluid reservoir? I can't find any reference to a separate clutch reservoir...
Thanks in advance.