my iframe video playing wrong video

my iframe video playing wrong video

iam used this code for my little project using local host xampp:
<iframe title="YouTube video player" class="youtube-player" type="text/html"
width="580" height="300" src="http://www.youtube.com/embed/2KkRwefwns0"
frameborder="0" allowFullScreen></iframe>
for video in this link
http://youtu.be/2KkRwefwns0
but in my local host the iframe going to this link
http://youtu.be/ZnuwB35GYMY
why?