Video eats my browsers

self-hosted server, but same on meet.jitsi

if i just have a one-on-one convo, the video eats my computer, new maxed out 13" macbook with eight cores, and it maxes them all out and the machine becomes useless. firefox, chrome, safari on catalina.

move convo to iphone client, and all is fine.

this may be an issue with having usb time machine backup running during video call.