=== Código HTTP : 301 ===

HTTP/1.1 301 MOVED PERMANENTLY
Content-Language: en
Content-Type: text/html; charset=utf-8
Date: Fri, 12 Dec 2014 23:39:18 GMT
Location: https://prezi.com/dfp1lpiax5nd/?utm_campaign=share&utm_medium=copy&rc=ex0share
p3p: CP="NOI ADM DEV PSAi COM NAV OUR OTR STP IND DEM"
Server: openresty/1.7.2.1
Set-Cookie: __putma=172e52b6-8258-11e4-8909-22000b260df7; expires=Thu, 07-Dec-2034 23:39:18 GMT; Max-Age=630720000; Path=/
Set-Cookie: _ptref="Imh0dHA6Ly9vaXJwZW5zYXJoYWJsYXIuY29tIg:1XzZnq:UNZV2vQh__BlLtLERts5WWwM4Qo"; expires=Sat, 13-Dec-2014 23:39:18 GMT; Max-Age=86400; Path=/
Set-Cookie: _ptret="IjEi:1XzZnq:oVGFW5G9JQ-PUSnrBc82GK5K2sA"; Path=/
Vary: Accept-Language
x-content-type-options: nosniff
X-Content-Type-Options: nosniff
x-xss-protection: 1; mode=block
Connection: Close


El enlace es válido.