Imagine: you're watching some video on a blog, and at 1:21, just for a second, a flying saucer appears..... Now, that's probably something you'd really like to respond to, so you press "react to this timeline" and add your reaction: "Hey did you see that ?? ".If another visitor plays this movie and reaches 1:21 your message will appear underneath the player!How do you get it?Widget: The easy way: if you're lazy, do not have a webserver with PHP and Mysql or any knowlegde of programming, use the widget-generator. It creates some HTML-code for you which you can copy to you webpage. I-V-O will take care of the messaging and hosting of scripts.DIY: download the source and install it on your server : There are 2 different ways to do this; you can use Timeliner-as-a-service; you implement the HTML & scripts yourself and use a I-V-O-webserver for storing messages.Or for the real nerds: you implement it yourself, and use your own webserver to store messages.