Some guy named Ian Fidance has a YouTube series where he goes and does jobs for a day. His most recent episode was with AEW where he worked with the ring crew, the props crew, the production trucks, and wardrobe. Apparently there will be a part 2.
Some interesting tidbits. The only thing they do to modify the prop tables are to remove the plastic rim on the outside edge of the table. It's real barbed wire and don't dull the barbed wire. The kendo sticks actually come wrapped in string to compress them, but they remove the string because it sounds better on TV but actually hurts more.