Poster Don did a good idea of the video and you talking about what you are recording of what you (currently) have. For electronics, appliances, need to zero in the make/model/year, since if destroyed, then insurance would replace with like/kind either by ACV or replacement cost.
Now some things like electronics could be the like/kind, but cost less and have more features, since over time some things will go down in price due to competition. A good example could be a computer or a TV. I have a computer (2005) that I paid almost $2000, but to replace would cost about $600 and my TV is the same, since better/more features.
The key is you want to film closets, drawers, cabinets, since many times have no clue how many dishes, clothes or pots and pans, since hard to remember, but with photos will be easier to remember what you had/lost.
But for any valuables, be aware that in many insurance polices may have limitations on how much it will pay, regardless of the value. So for heirlooms, jewelry etc, may need to buy a rider/endorsement to cover more or buy a separate policy to cover those.