My
Blueiris setup includes 25 cameras from Panasonic (from 2008), Foscam, Amcrest (now all deactivated), Ubiquiti, SV3C, and even a Nest Hello video doorbell.
It's one of the great things about Blueiris to allow integration of all those different cameras.
My latest inexpensive cameras are a pair of TP-Link Kasa KC100 ($40 each) but, alas, there appears to be no way to get their video to Blueiris.
Note that Blueiris accesses my Ubiquiti cameras via their RTSP streams from the UniFi Cloud Key Gen2 Plus controller/NVR.
The other weirdness is the Nest Hello sends everything to the cloud but I can use a guest view URL to bring it into Blueiris.
Here is a shot showing Blueiris directly on the right with my 15 main house cameras and web access on the left showing the 10 at the guest-house.
Here is a diagram showing the approximate connectivity to get to the various cameras.
It is not showing the Kasa KC100 at this time.