Long loading time of picture glance card looking for alternatives

In my dashboard I have three security camera’s which are already setup via webrtf. But still every refresh of dashboard causes a few seconds of loading time. I don’t like this and am looking for way around this. One thought is just displaying the snapshots because don’t need live view but it would still work via picture-glance card so probably same effect on that one. Any thoughts on how to workaround this?