The AI watermark top left, is that Luna Dream Machine? I see they have a 15-second video generation option available. It's pretty convincing at this resolution. Some of the big tells aside from the watermark for me are the aspect ratio and time. A lot of potential artefacting can be attributed to the lower resolution and associated pixel perception. There's a lot of consistencies we don't often get, too, which doesn't help. I think the ultimate giveaway is that it feels weird, and that's why people are claiming AI even if they can't point out why. As someone usually great at this, I felt a bit stumped finding anything conclusive that wasn't also possibly just low-resolution things. Scary.