If you manage to secure a legitimate copy of this portable build, always back up the settings.reg file and the db folder to the cloud. A lost USB drive shouldn't mean lost security configurations.
A built-in web server (UI3) enables viewing from any web-enabled device. Blue Iris 5.3.8.17 -x64--ENG--Portable-
Standard Blue Iris requires admin rights for installation (to start the service). The portable version runs as a standard user application. This is ideal for: If you manage to secure a legitimate copy