Any help on this noise?

scampi said:

I’m looking to buy this ninja250 from this guy and he sent me this vid of the “clicking noise” it’s making. He says it’s a dirty chain tensioner but from what I’ve read a dirty tensioner doesn’t make this noise. Not only that, but I’m not hearing any clicking, does this vid sound normal? I’m linking the vid here.

Nox Vidmate VLC​

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