Fix PMD errors

According to my CI server there are some PMD errors in the library: 

Dailymotion.php 1  
Flickr.php  2  
Metacafe.php    6  
Mtvhive.php 3  
Myspace.php 1  
Qik.php 1  
ServiceCache.php    1  
Ted.php 1  
Video.php   2  
Vimeo.php   2  
Youtube.php 2   
