Recording of only one participant

Hello, I’m trying to achieve the following but can’t find the right settings. I’m recording a video call. The host has not turned on their video, only the other participant has. I want only the video of the participant to be recorded. So far, the recording always shows the person who is currently speaking. However, I want the participant’s video to be shown continuously, and of course, the audio from both sides should be recorded. Thank you very much for your help.