tvOS apps are not always the same as iOS apps. Here's an example for YouTube (difference is in platform parameter):
iOS: https://uclient-api.itunes.apple.com/WebObjects/MZStorePlatform.woa/wa/lookup?version=2&id=544007664&p=mdm-lockup&caller=MDM&platform=enterprise&cc=us&l=en
tvOS: https://uclient-api.itunes.apple.com/WebObjects/MZStorePlatform.woa/wa/lookup?version=2&id=544007664&p=mdm-lockup&caller=MDM&platform=atv9&cc=us&l=en
Right now the Decrypted iOS IPA App Store doesn't support tvOS apps, so can they be added?