Local videos not playing on AirPlay

I stream my TiVo videos from a remote Roamio. Programs stored on the Roamio stream just fine to my iPad and from there I toss them up to the tv using AirPlay through my AppleTV. However, when I am on the same network as the TiVo, I often download videos direct to the iPad to save on the data load over the Internet. Back home those locally stored videos will play just fine on the iPad but when I try to send them through AirPlay only the audio goes to the tv. Aren't these supposed to work? Is there a setting I am missing?


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