@acceptable , I think I now I understand what you mean. I have two Half Pave Lock bracelets, and they do make a sound, but only if I shake them. I have never shaken them until this morning, at your request. I also have the Baguette and Half Pave Lock, which is far more substantial and doesn't make a sound when shaken. I'd buy these all again in a heartbeat because they're so wearable, comfortable, easy to put on and take off, modern and unique.
The sound you've videoed is because there has to be some "give" to be able to swing the smaller side around to open and close the bracelet. Does your Lock bracelet make this rattling sound while you're wearing it? If so, please take it to Tiffany for repair. That is not normal.
Also, I'm wondering if there was some reason you thought to shake your Lock bracelet. If so, please explain.