You do not need to jailbreak for installing the app which is not there in app store. You can use iFunbox (download from internet) and connect the iPad to PC like you usually do but instead of using iTunes, open iFunbox and you will be able to navigate your iPad and also install apps provided you have the IPA file. Check your PM for details about the AV Player.
I tried searching for iFunbox using appcenter but couldn't find it. When I googled and tried to install it said failed. Is anyway I can get this installed on my iPad?