Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
And why does Roku allow the YTTV Roku app to advertise Max and display content you can't watch, if you can't even get it on what you're watching with! I see now why they offered a prelaunch discount, just to **bleep** us into subscribing to something not available! Wonder how much they made the first month ($12 x # of suckers = millions), and didn't even give us what we paid for!
You'd have to ask HBO, not Roku. With only a couple of exceptions, Roku does not develop channels for their devices. They have The Roku Channel, and the Roku Media Player. Every other channel is created and maintained by other entities. That is usually the content provider, such as HBO.
It's been confirmed by HBO (att) that the app is ready to go.
While I haven't watched the video, I assume it's something that is being side loaded. It's not available from the Google Play store. Side-loaded apps can be disabled from the other end. It might work for a while, and it might remain working. We have no idea.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.