Big sized video upload + encode it

I want permit users to upload video files on my site. Video can be oversized, not just 2,...,8 MB as set up in the [login to view URL] on the server. Process what I want: --------------------------------------------- 1. step: upload big sized video (~100-200 MB, server-independent, with Ajax or Javascript or Flash) 2. step: make watermark on the video + convert it in less size Thats all, let's have an easy job! :) We will communicate until this smart project, becouse server configuration needed to convert the video file.