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Sure – but technical development is the only positive outcome, it won't solve the social side of the issue.

The social side is better served with a signature from the device manufacturer stored in the metadata (or as a watermark) of the original file verifying that a photo/video was taken with an Apple etc lens. Make two copies of the file on capture one read only with the signature and one for editing.

No it's not, because there can be no technical guarantee wrt to the accuracy of its assessment because of an arms race power balance in perpetual fluctuation. There's also computational cost, hackable vendors, inevitable implementation errors and vulnerabilities, vulnerable supply chain, corruption, etc.

I'd rather not teach people to trust AUTHENTIC VIDEO™ (that can't guarantee authenticity), but to learn to deal with the fact that there's Photoshop for video now.

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