Malicious e-mails sharing links to spoofed YouTube site are spreading in these days.
The target links are www5.youtube.com.site{BLOCKED}.be4koy.com.es or www6.youtube.com.referrer{BLOCKED}.kazli.cn according to security company Trend Micro.
The spam e-mail is using social engineering technique to inform about the need of newer Flash player.

Link:
http://blog.trendmicro.com/youtube-spoof-site-serving-malware/