Hello, I am new to you and I apologize for my English because I am not very good at speaking it. I would like to have some advice about Blue iris such as how to trigger the camera or the camera automatically when someone walks past. Thank you for your answers

If you only want it to record on motion you'd set the record tab to record video When Triggered and then set the Trigger tab to a source of Motion Sensor you'd need to do that for each profile you want it to happen on or just make sure all the other profiles are set to Sync with Profile 1.

There are self help instructions within this website - look for the threads written by Varghesesa (Sam) like this:viewtopic.php?f=23&t=2426

There are instructive videos on Youtube too.