Doesn't work for me. Videos just get stuck on "Buffering". Won't play on my Galaxy Nexus with 4.3 either. Really wonder why hbo pretty much always stops working with every android update, but nearly every other app I have installed continues working.
So, just to be clear. you've got HBOgo sideloaded on Android 4.3 and not only will it install, but it'll play anything on the app without the endless buffering cycle that everyone else seems to be getting? I can install, but nothing runs. What are you doing differently from the rest of us?