Unless we were talklng about the theft of a Van Gogh or the Hope Diamond, no one investigating a claim is going to sit through a video that long.
And even then, very little weight would be put on the video as evidence, and it alone would be far from enough proof to an insurance investigator or in a court of law -- and that's making the big assumption that either would even consider its use as evidence, given that there are so many ways to tamper with a video.
What you want is some kind of guarantee that you will never be cheated or have a loss selling on-line. Sorry but that is not possible.
ALL retailers face loss through theft, damage to the merchandise on the floor, abuse of their return policies, credit card chargebacks, etc. Pricing must cover those inevitable losses. If the losses become too great, the retailer shuts up shop, as CVS, Walgreens, et al, have done recently in some major cities.
Your idea is that your local police department will look at the video, go after the thief, the local prosecutors would then bring a case, and finally the court would see that you got your money back, means that you don't understand how the justice system works.
If you cannot bear the loss, financially or emotionally, of whatever it is you intend to sell, then you must sell only in person and for cash. And check the cash to be sure it isn't counterfeit.
.
