My frigate runs in a separate container and is configured to send MQTT messages to Homeassistant.
Frigate can also expose snapshots which Homeassistant displays:
http://myfrigate.lan:1984/api/frame.jpeg?src=CAMERA_GARAGE
In frigate, add this to the top of your configuration file:
mqtt:
enabled: true
host: IP_ADDRESS_OF_YOUR_HOMEASSISTANT
port: 1883
topic_prefix: frigate
user: USERNAME_YOU_CREATED_FOR_MQTT
password: PASSOWRD_YOU_CREATED_FOR_MQTT
Observe the messages, pick the one which suits your needs.
Follow this for an example: https://chatgpt.com/share/6893fd1c-2940-800c-a358-a840029e6e...
You dont really need to add the HA automation via yaml, you can click it through manually.