Ticking sound from engine/clutch 3.0td

[Ste981-ITA]

Hi!!
someone have found the cause of this ticking ??
I not! is always the same after 30.000 km!
I used the toyota normally and has never changed!
I always think that comes from inside the cluctch...

This is another old video:
https://www.youtube.com/watch?v=NsMNiwhUn78