Hello!
My nameis Denn, I am all-round web developer from Ukraine.
Creating various web things for 5 years, using php, js/jQuery, Angular, HTML5/CSS3, MySQL.
Can do this work for you!
It will consist of 2 tasks:
Client-side - will be small script that dynamicly loads prepared thumbnails & shows them on mouse over.
Server-side - will be script which probably will use ffmpeg to cut thumbnails from video.