Jitsi meet - how to disable video

Hello,
I was wandering if there any way to disable video and make voice only chat using jitsi iframe https://jitsi.github.io/handbook/docs/dev-guide/dev-guide-iframe , I checked the docs and https://github.com/jitsi/jitsi-meet/blob/master/interface_config.js file can not find and properties which can disable the video?