Insurance companies differ.

Jewelry is paid up to a certain amount on your homeowners, usually a pretty low amount. Get riders for expensive items.

Have serial numbers for high dollar items. It's amazing what can be gleaned from a serial number/model number on a TV. The 90 inch tv the insured said he bought last week had the serial number of a 19 inch portable last made in 1982. Of course, scanning the original receipts is good.

Videos and pictures can be faked. Or you could have rented the stuff from someplace, did the pics and returned the stuff. Vids and pics from successive years will more or less prove you owned the stuff. Have a newspaper with the date in the photo/video for reference.

Load all your important data on a flash drive, and keep it someplace not in your house. A safe deposit box, at work in the back of a drawer, at a family member's house - just not a home.

Stuff I learned as a legal NCO working claims against the government.