If a picture is worth a thousand words — which it is, I just cashed in a picture yesterday — then a video must be even more valuable, right? So thinketh Yelp, as it says that it’s previously announced video feature is now ready for users who want to add short clips to their reviews. While we’re sure you’re practicing your best fist shakes and diatribes and all the best snarky comments you can squeeze into a 12-second video, Yelp says in a blog announcement that it sees the video feature as more of a way to showcase the ambiance of a place, as photos do, rather than a soapbox for your vitriol or a sure shot to Internet stardom. “Worried your video skills are not up to par?