Welcome to the forum! Good to "see" you and hope you enjoy your visits.
Quick Time is not something you can download to the iPad. You can only load apps from the App Store onto the iPad, and Quick Time is not available as an app.
However, many people have had success with an app called OPlayer HD to view their videos. And, there is a lite version so you can see if it'll work for you before plunking down the cash for the fancier version. There are many, many, many video viewing apps at the store, this is only my suggestion. I am sure others will be along to give you ideas on what they use...
Marilyn