Need Help in Small Project

I need help with a small project that I am doing for my client. My clients have a company that does staffing for hotel workers and when they sign up with him, they have to watch 4 separate training videos. What I need help with is a script of some sort that will pop-up a sign in box of some sort after every video was finished so we can log a record of that person watching each video. How can I accomplish this with an open source free script?

What do you have so far?

This depends more on what program you use to see the video. Some Video Players have options to excecute a program after a Video is finished. so you will have to write a simple script / batch file (depends on the OS) that would start a player with custom options set. After the Video is run, instruct the player to open another script to do the Registration Job. This again can be a VB script on Windows or else you can try for a launching a new Template notepad and fill details which could be again a shell / Perl script..