It's been really interesting to see another recent uptick in media (and HN) coverage of deepfakes, modified media, etc lately.
There are virtually endless ways to generate ("deepfake") or otherwise modify media. I'm convinced that we're (at most) a couple advancements of software and hardware away from anyone being able to generate or otherwise modify media to the point where it's undetectable (certainly by average media consumers).
This comes up so often on HN I'm beginning to feel like a shill but about six months ago I started working on a cryptographic approach to 100% secure media authentication, verification, and provenance with my latest startup Tovera[0].
With traditional approaches (SHA256 checksums) and the addition of blockchain (for truly immutable and third party verification) we have an approach[1] that I'm confident can solve this issue.