Repairing 73 Weird Sound

[Mephisto]

https://youtube.com/shorts/E2An2IjQKlc?is=1VUCriHO-uAY93Mu

 Finally getting around to repairing my Mark II 73.  It's a mid 80's model.  Is anyone familiar with what's causing this sound?  I'm about to order a vintage vibe refurb kit.  Is there anything else I should pick up?  Thanks in advance!

[The Real MC]

Might be loose screw on the tine post, might be dried/hardened rubber washers on resonator mounting screws, might be pickup too close to the tine.

[gacki]

Wouldn't it be more useful to do a video of the INSIDE of the piano (read: the tines) when this happens?