BOTH!
Do the NSTV thing, with whatever you see fit whenever possible, and then have a feature saying like "Top Rated of the Week" and add the top rated member video of the week. Also, if one video is top rated for more than one week, just add the second top rated video or whatever. Also, I know that there's a "video of the week" thing at the bottom of the home page, but it'd be funny to include that as well, cuz they're dope too!