You often get a high ranking in the SERPs for Google, then you'll drop (probably). I think it's to give new pages/sites a chance to be found by folks searching the web. See how you're doing in a few weeks. If you're still at the top for your key words, then be excited.
Still early to predict the daily average. 21 UV in the first 24 hours according to Google Analytics...nothing exciting yet...I hope there will be a slightly increase over the next few days
This will put it in to perspective: allinanchor:"video web directory" - Results 10, most of these pages have the link with that anchor internally, not from other sites so just a handful of links from other sites will do the trick.