Thanks, Martyn, MrWizard, and pyoung47.
Looks like the Apple HDMI lightning adapter may be worth a try. Asked whether it would work with the iPhone AT&T Watch TV app in the Amazon Q&A section for the adapter. Received no replies from anyone who had personal experience with the app. Surprising since there's 36,000 reviews and over 1,000 Q&A's already.
The impression I'm getting with the Apple HDMI lightning adapter is that it does "work" with all the major streaming apps. However, the catch is, some of the individual networks like the Discovery Channel have the ability to independently block their content on Hulu, Netflix, etc. when the adapter is used.
To clarify, when a user uses the AT&T Watch TV app on their iphone, they can stream 24/7 for free using cellular data. If a AT&T user streams with the Hulu, Netflix apps, AT&T deducts the data used from their monthly cap. Even on AT&T's so-called "unlimited" data plan, AT&T starts throttling data at 22gb. Wouldn't take more than a few days of streaming to use up the 22gb.
