You can view the two new video clips by visiting the Persona 4 site but, if you've watched the long Famitsu trailer already you'll have seen most of the Kuma one already. Again, the brief profile about Kuma isn't something we don't know already.

Kuma

A mysterious character who meets the cast in the other world. He appears to possess the power to control a Persona but is he a friend or a foe?

The video clip "The Mysterious Kuma" shows Yosuke ripping Kuma's top off thinking he was wearing a costume but is surprised he is empty inside. Kuma searches for his top and puts it back on, feeling sad that Yosuke treated him as if he is some kind of criminal.

Mayonaka TV, The Window

A summon from another world. The truth behind Mayonaka TV is revealed as the screen gradually becomes brighter.

Thoughts

So does the MC get dragged in to the point where his body stops him from entering the TV completely? That's the impression I got from the Famitsu magazine article. Maybe he gets knocked out and ends up thinking it was all just a dream or, he manages to fit his head through for a peek.