You’re not kidding. I had to export video from one that still requires ActiveX, and this DVR was made in 2020.
You have to open the web UI in an Internet Explorer tab in Edge and it wants to install an ActiveX control, but the control is unsigned. Edge will not allow that. You have to dig through the page source, download the WebClient.cab, extract it, and install it the .ocx manually with regsvr32.exe.
Did I mention I’m using a Mac? I got it working in a Windows 11 VM and I hope I never have to do that again.