One of the many quirks about the iPad is its inability to play Flash videos. Apple co-founder Steve Jobs wrote that Flash wasn't supported because it lacked full support for touch screens, it created security and performance issues, it ate into battery life and it created an extra layer between the developer and the operating system. Luckily, there are a few alternative web browsers for the iPad that support Flash, the best of which are Photon Flash Player for iPad and Puffin, both of which are available in iTunes for a small charge.
Puffin 3.0 Download Link: http://tinyurl.com/cz39sz7
Photon Flashplayer Download Link: http://tinyurl.com/othuf3e