When you purchase a downloadable item from our store, you have unlimited access to your purchase and can download it as many times and as often as needed.
For videos, we recommend using VLC Player. It is a free download. Here is a link:
Apple doesn't allow videos to be save directly to an ipad or iphone. You can use itunes to sync a saved file from a computer to your device. We also recommend a third party app called Documents by Readdle. We don't own that app, nor support it. Please download it from the App Store.
Here is a link to the Apple site for using itunes to sync a video to an ipad