Is Zoneminder your main interface? I've been using it for several years with a few Reolink 5MP cameras, and maybe it comes down to choices I've made which I should revisit, but it's painfully slow (say, 30 seconds) to start playing, or seek within, an event video. I record only events.

I am now experimenting with the RLN36 NVR instead, and thinking about having enough disks to record continuously instead of events only.

Ideally I want continuous recording, and I want a timeline of events that aren't separate files, but are just shortcuts to alarm times within the continuous recording, with minimal seek delay. Interface must be friendly to small screens (phone size) which the RLN36 web UI isn't particularly. Maybe the zmNinja app.