HDMI itself has DRM, and I can imagine there are cables that work for non-DRM
content, but won’t work for DRM content.
Here’s an article on the issue, and some suggested fixes:
https://www.howtogeek.com/208917/htg-explains-how-hdcp-breaks-your-hdtv-and-how-to-fix-it/
It is much more simple... it is up to the app author. If they don’t want you to
display on an external screen they disable the ability.
I have my internet through the cable company. They have an app that shows live
local stations. They don’t allow it to be shown on a big screen unless you
subsc
