[m3galinux]

It's not just browsers. One popular Windows-based video surveillance platform has hardware decode support for H264, but it's software only for H265; that's on both Windows clients and Android mobile. That means your H264 cameras show up instantly but H265 takes a few seconds per stream, and too many of them on one screen means you're skipping frames. At least two companies I installed these for decided to double their storage instead of taking the perceived UI performance hit.

[cesarb]

Are you sure it's "not just browsers"? With the current popularity of embedded browser engines, there's a good chance that these clients are actually browsers in disguise, or at least that they embed a browser for the frame which shows the camera streams.