Well of course it was cloth or "Hollywood Maille" as I like to think of it, which isn’t really all that bad IMO since we can’t expect actors to spend 12 + hours in armor. BTW, the vendor at the MDRF that made John’s Raven helm has a nice harness of Knitted Maille that looks excellent from 5 feet away.
Oh yeah, Chuck from Highland Anvil. He does have a set of that, I had nearly forgotten. That's true, it's hard to imagine a long filming shoot where you'd have to be in armor for 12 to 16 hours at a time, for weeks.
The LOTR movies was one of the first I believe to use actual PVC maille which was certainly a step up, although the one scene during the Two Towers at the siege of Helms Deep the maille that Gimli put on certainly made a good solid metallic thump sound when he dropped it so maybe that was a prop just for that scene.
I don't think you can trust the sounds at all. Most of them are edited in. It's amazing to see what lengths go to for the "foley" sounds, where they create custom sounds just for characters walking and so forth that are so subtle you're not consciously aware of them when you're watching the film. But without them, the scene would seem fake. Sounds like the rustling of clothes, rubbing up against furniture, footsteps, and so on. All faked.