The Video Mute Participant is used by the host of the meeting to disable the video of another participant. This is useful in case some guest forget that he has the video enabled.
To load this plugin, download the source code from the Github link here. Once you have this code, move it into the plugins folder of your theme, you should name the folder video-mute-participant.
Once you have copied these files, open the settings.json file inside of your branding package and add the following code to the plugins array.