I'm trying to download Bonzuna in Safari to watch a movie and keep getting a "Safari can't download Bonzuna" error message. Is there some other way to get this player?
By default, Safari does not allow for downloads that requires installation. Certain formats are supported for downloading, but from the looks of Bonzuna, it's an executable installation file, which you cannot run on iOS. As there are no iOS-native extensions or apps for Bonzuna, you won't be able to use Bonzuna
Hulu.com appears to have season 1 and 2 of Downton Abby. You'll have to pay their subscription fee (about $8/mo) to watch it on the iPad.
Other services, like Netflix, may have it as well. Netflix is also about an $8/mo subscription. Many TV channels have their own apps, and they are usually free; however they seldom offer more than three or four recent episodes at a time.