From the Webpage: "Piwik aims to be an open source alternative to Google Analytics, and is already used on more than 200,000 websites.
Piwik is a PHP MySQL software program that you download and install on your own webserver. At the end of the five minute installation process you will be given a JavaScript code. Simply copy and paste this tag on websites you wish to track (or use an existing plugin to do it automatically for you) and access your analytics reports in real time."

VideoJS is an HTML5 Video Player with 3 core parts: An embed code (Video for Everybody), a Javascript library (video.js), and a pure HTML/CSS skin (video-js.css).

Using Video for Everybody as the embed code means you know it’s compatible with many devices (including ones without javascript).

The javascript library fixes browser & device bugs, and makes sure your video is even more compatible across different browser versions.

The pure HTML5/CSS skin ensures a consistent look between HTML5 browsers, and easy custom skinning if you want to give it a specific look, or brand it with your own colors. See the skins page for examples of custom skins.