First, you need to change the format of the secondary stream to MJPG.
Leave the default http port at 80
The only condition is that only one connection is allowed at a time, this can be useful for home automation applications, but for web it can be inconvenient.
Also, remember that it does not work in Internet Explorer:
All the cameras that appear in the following search have this system with the limitation that we have commented
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How to request an mjpg image from a SAFIRE recorder or camera via HTTP