[starshadowx2]

The face of the girl on the left at the start in the first second should have been a giveaway.

[Perseids]

My intuition went for video compression artifact instead of AI modeling problem. There is even a moment directly before the cut that can be interpreted as the next key frame clearing up the face. To be honest, the whole video could have fooled me. There is definitely an aspect in discerning these videos that can be trained just by watching more of them with a critical eye, so try to be kind to those that did not concern themselves with generative AI as much as you have.

[yccs27]

Yeah, it's unfortunate that video compression already introduces artifacts into real videos, so minor genAI artifacts don't stand out.

It also took me a while to find any truly unambiguous signs of AI generation. For example, the reflection on the inside of the windows is wonky, but in real life warped glass can also produce weird reflections. I finally found a dark rectangle inside the door window, which at first stays fixed like a sign on the glass. However it then begins to move like part of the reflection, which really broke the illusion for me.

[booleandilemma]

No one is looking at her face though, they're looking at the giant hello kitty train. And you were only looking at her face because you were told it's an AI-generated video. I agree with superfrank that extreme skepticism of everything seen online is going to have to be the default, unfortunately.

[vlovich123]

Hard to not discount that as a compression artifact.

[magicalhippo]

Just like all the obvious signs[1] the moon landings were faked.

[1]: https://web.archive.org/web/20120829004513/http://stuffucanu...

[lelandfe]

Just wanted to say I really enjoyed this!

[Nition]

One thing that's not intuitive to spot but actually completely wrong, is that in the second clip we're apparently inside the train but the train is still rolling under us.

[lmm]

Or, y'know, the camera's moving smoothly backwards through the train? Would be bit of an odd choice (and high-effort to make it that smooth versus someone just carrying it) but not impossible by any means.

[tim333]

Also "HELLO KITTY" being backwards is odd - writting on trains doesn't normally come out like that eg https://www.groupe-sncf.com/medias-publics/styles/crop_1_1/p...

[slightwinder]

All the text is mirrored. It's not unusual doing this to avoid copyright-filters. This kinda adds to distracting suspicions.

[colordrops]

The whole video was probably mirrored before being posted. Doesn't seem to be related to being AI generated.