62274 may be video 4.

Unless I made a mistake, if the Vizio codes don't work, it means the TV doesn't do those functions. Here's the thread that tells the Vizio discrete codes (need to be converted to EFC format for you to use) www.remotecentral.com/cgi-bin/mboard/rc-discrete/thread.cgi  and some of models which work or don't work.