There is a ton of them. E.g.:
WPtube ? Free WordPress Tube Theme (this one made by the guy from GFY)
https://wordpress.org/themes/novavideo-lite/ (recommend for use with KVS Player plugin)
Novavideo - Responsive WordPress Video Theme (recommend for use with KVS Player plugin)
Video Hub - WordPress Video Theme | RichWP.com (one more video theme)
deTube - Professional Video WordPress Theme - WordPress | ThemeForest (yet another one)
etc...
Note: all of them can be used with my CyberSEO plugin (see sig.) to run your WP tube site on autopilot
