Are you currently using Home Assistant? If so, there is a
Blue Iris Integration to get the streams. If not, then you need to investigate it and see if it something you want to pursue because there is a learning curve. Blue Iris is just one portion of my home automation. I have z-wave light light and fan switches, z-wave sensor on mailbox door, a zigbee leak detector, DSC security system, esp8266 WiFi garage door openers, etc. so it was worth the effort to learn about Home Assistant. Below is just a general idea of what is involved. I won't go into all the details, but if you are using Home Assistant I am happy to share all my settings and more details.
Basically you will allow Home Assistant access to your streams. In Home Assistant for Blue Iris I use a mjpeg because it loads faster. My entry in HA configuration.yaml looks like this
- platform: mjpeg
mjpeg_url:
name: Main Door
username: !secret bi_username
password: !secret bi_password
authentication: basic
For the Google Home Hubs I integrated them using Nabu Casa, $5 per month, but make it easy to integrate both Google Home Hubs and Alexa. You can integrate them manually if you want and save the $5 per month. The Sony TV (Bravia) also has an integration for Home Assistant.
When I get an Alert on BI it posts a MQTT trigger to Home Assistant to start an automation. For this you have to setup MQTT on Home Assistant and Blue Iris and then create a binary_sensor in Home Assistant configuration.yaml.
When the binary_sensor doorbell_motion goes from Off to On it triggers an automation in Home Assistant. The automation determines if the Sony TV is on or off. If it is on, the current doorbell stream is shown on both Google Home Hubs and the Sony TV. If Off I just display to Google Hubs (I don't want it to turn on the TV if it is off) I show 15 seconds and then resume.
The method I use, loses the first few seconds of video when you cast it to the displays and tv, but I am not concerned because I have that recorded in BI and we are just interested if someone is at the door and who they are.
Home Assistant also has a Stream component that allows you to record and you can prerecord like BI but the file format required loads to slow when casting to my devices. I haven't played with it very much, but I know it could be faster if I changed my video stream setting. The mjpeq works very well for us so I haven't bothered.