There was a post here a few days ago on amateurs (people who had never even touched python before, let alone tensorflow) who were using deep learning to generate fake celebrity porn. The results are actually pretty believable:

https://news.ycombinator.com/item?id=16040463

Is this safe to view at work?

Yes, first link is to a 4 day old post on HN, which links out to another SFW writeup. The title of the article (AI-assisted fake porn are being used by people on Reddit for self-completion) is worth keeping off the monitor if you don't want someone to quickly scan the word 'porn' on your monitor, but there are no NSFW photos or content.

There's a whole radiolab series about this called the Future of Fake News http://futureoffakenews.com/

And or how do you prove someone's innocence if you can generate a believable, fake, crime video.

Supporting counter evidence will become that much more important.

You might be able to use this same technology to counteract this from happening.

If you generate content you would have a base to test an AI to spot actual fake content. You could use video's and pictures like these to test a learning AI to spot discrepancies, then report findings in detail.

Makes me wonder if there is a future in forensics for this type of technology.

This network was trained using an adversarial approach. What that means is that a second network that does exactly what you say was used to train the first.

They kept training until they created images that could reliably fool the discriminator. A more powerful discriminator would just be used to create better fakes.

If there were a government conspiracy to put you away, most of the time, they wouldn't need fake video evidence to convict you - just a bit of prejury by officer witnesses.

There's going to need to be some kind of blockchain-style tech that allows the source and veracity of video to be determined.

A blockchain in this case would just be a timestamping service, to prove the minimum time that elapsed since the image existed. That’s only useful if the time to create a fake is significantly more than the resolution of the chain - 10 minutes for bitcoin, 15 seconds for ethereum.

But that I only makes sense if you know ahead of time that the information will be valuable, and it only proves the age if there is sufficient hash power on the network, so a “private” blockchain would not be viable.

Imagine how this could be misused to start wars-

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

Heinlein's fair witness?

This side of the house is white.

You cannot infer that the type of structure supporting the visible surface is a house, or part of one.

By that scheme you can not infer it is a surface either. But that was the example given in the book.