I'm of the same opinion that this is a jailer (perhaps elite guard or something), not the jailer. Just too many differences between concept, trailer and this actual model:
Clothing is different
Color palette is different
Missing features
The model itself too different - if you look in trailer, jailer there looks a lot leaner than this human male.
Model size is not a proof, it was probably just exported like that.
Correct me if i'm wrong, but the trailer (this one /watch?v=QInBVzBJuU4) seem to be using a sort of in-game models, right? So between it and this model, the difference is too large imo.
So while the model might not be VIP, i think we are yet to see the true model of The Jailer.