What type of Android TV box? The NVIDIA Shield TV is recommended by the TinyCam developer. I’ve seen at least a few cases of people who were having difficulty with TinyCam running on Fire tablets or other low powered devices switch to the NVIDIA Shield and have much better experiences.
As James mentioned, Blue Iris has a built-in webserver that can be enabled. If you’re just using Blue Iris on your network, you won’t need to do any port forwarding and may want to change the Authentication option to ‘Non-LAN Only’: