Update Dailymotion comment

Hi,

In the dailymotion.php file, line 26, it would be appropriate to replace the current comment with this one:

//pass thumbnail_60_url (60px height), thumbnail_120_url (120px height), thumbnail_180_url (180px height), thumbnail_240_url (240px height), thumbnail_360_url (360px height), thumbnail_480_url (480px height), thumbnail_720_url (720px height), thumbnail_1080_url (1080px height), for different sizes

Regards.