The actor in the videos below is reading for the part of Winslow 'Wynn' Schott. TV Line's character breakdown described him as a "twentysomething tech whiz/Comic-Con stalwart toils for CatCo as a programmer, unaware of his own (toying?) potential."
He also is said to carry a torch for Kara (who will be played by Melissa Benoist), aka Supergirl, who lives next door to him. The first video is a scene that illustrates Wynn's crush for Kara - before he finds out she is Supergirl.
Oh yes, that's the other thing, TV Line said he wouldn't be aware of Kara's secret, but in the second video he already knows of her powers and is the person Kara goes to with her issues. I guess he'll be her Cisco/Felicity, sort of. And it is revealed in that second video that Supergirl will wear and cape and that Wynn will sew her a superhero suit.
Here's an excerpt from the second video:
Wynn: I can't believe I'm actually in your apartment.
Supergirl: Wynn, if we're going to use our lunch half-half to help me with my super-hearing we need to work fast.
Wynn: I'm still not sure how all this is happening. Maybe the brownie I ate belonged to my roommate.
Supergirl: My abilities come from your Sun. The planet I was born on...
Wynn: Woah! Wait! Hold on, you're from another planet?
Supergirl: Krypton. Yeah, so is my cousin.
Wynn: You and him? You're related?
Supergirl: Our dad's were brothers. I'm going to need you to focus. I want your help. I told you, I don't a thing about fighting crime.
Wynn: Please, you got the hard part down. First, you need...
Supergirl: A costume.
Wynn: It's called a suit.
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Supergirl: How do you know how to sew?
Wynn: I'm a social experiment, my moms were trying to create a post-modern man. I can also swing dance and I do a fantastic curry.
You look very pretty ... For a crime-fighting alien. Not that you look like an alien.
Supergirl: I got it!
Wynn: Maybe there are entire planets inhabited solely by gorgeous people. So, second thing stopping you from being a crime-fighter is a crime. Hacked into the [cop's] frequency. Think the I.T. would've built better firewalls by now. I suggest we start with something basic. There's a car chase on the 1-12 freeway in progress.
Supergirl: I could do a car chase.