I have tried Android emulators with mixed results. While Bluestacks can play AP video offline it sucks the hell out of the battery, which can be a problem on an airplane. other emulators did not display video at all.
Sadly it would seem Amazon is being a dick about this. Years ago you could download Amazon content on Windows but after Amazon Fire Tablets came along the capability no longer exists. Not sure exactly when this changed but it was in that timeframe.