Yeah, the screen should support video - it has a startup animation so why wouldn't it? That being said, I don't see a reason for them to put the proper inputs inputs into it. But I don't want to tear my car apart to find out. So if anyone gets the nerve up and figures this one out, let me know. I'd also be interested to know how to get it to switch to the camera input when in reverse once it was wired correctly - you'd have to wire power to the reverse lights on the back end, and then figure out how to make it default to override any other input while it was on.
I'm not a fan of the clip-on rearview aftermarket screens, and I don't want to add an extra screen that's hanging out on my dash full-time. Help me, Focus Fanatics. You're my only hope.