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Got news for you! It's already possible to produce fairly accurate fake video of people saying things, in their own voice

https://www.youtube.com/watch?v=cQ54GDm1eL0

Hmm, video evidence may be trustworthy - eg. video from a CCTV system. Perhaps it could be written onto some write-once, tamper resistant format? Not sure how that would look.

I suppose one place to start thinking about this would be photos. Are photos admissible evidence or do courts only allow negatives? Photos have been modified for a very long time. This is probably the most famous example: https://amp.businessinsider.com/images/52af668569bedd3b2643d...

But yes, I am far more worried about how much more effective fake news will be once they start coming with actual videos.

Cctv on blockchain?

How long? Several years ago. Videos have been faked forever. There’s been all sorts of optical illusions, forced perspective, and special effects for 100 years.

You shouldn’t trust any single source. Only a preponderance. Even then be open to skeptics