98290 you tube PHP script

Hi There. First sorry for my bad english. I bought PHP script, a script to run your own video site , I try to upload it in my server and everything went fine, till I notice, That does not show the thumbnails. Im having a problem with FFmpeg-php. my server has installed already this FFmpeg-php. so Im looking for someone to Install this srcipt for me. When you had Install this for me I wan't you to explain what I was doing wrong with FFmpeg-php. Please bear in mind that I want the script first Install,and test it, when everything works fine then I will pay you through paypal. Many Thanks