It's a 3-minute trailer. I don't think they spoiled anything.
Sure, the artists probably put tons of effort into it, but if you are reading an article instead of the short clip, then probably you didn't care about it as much anyway?
They spoiled the twist ending to the trailer. It's right there in the article, right before where the video was linked/embedded. It's unavoidable for readers who engage with the article in good faith; the writer abused the benefit of the doubt that was given to them. I don't understand what you're arguing.
Sure, the artists probably put tons of effort into it, but if you are reading an article instead of the short clip, then probably you didn't care about it as much anyway?