Gif thumbnails from hosted videos

Hello, I have a tube site, which I copy the embed codes from other video hosting sites and then the video are displayed at my site. I use Wordpress with DeTube template from tube sites. My problem is, when I copy other videos my DeTube template doesn't know how to create a gif thumbnail for preview for those videos. So what I need is a code which I give it a the video link, and it is automatically creates a gif thumbnail (10-15 frames at least) from that specific video. My tube site is a porn site so I need this code to support all major porn tube sites out there (dailymotion, youporn, youjizz, xtube, tube8, etc) If you need anymore details please PM me. Thanks!