Agustin X-T30

Hello mates, I am looking to buy an old but good Fujifilm X10 to come with me everyday in the bag. The seller sent me a video indicating that when the camera is pointed to the ground, the image destabilizes somehow and it seems to have issues focusing. I would like to know if any of you guys could have a clue on where the issue resides on? I am afraid it is an issue inside the lens like some loose part that comes down when pointed down. I will share with you a link with the video if you would like to have a look. The issue is better appreciated at the end. Any comment or assistance is highly appreciated! https://youtube.com/shorts/EZBwFbSxAP4 Thank you very much!