Any recorded video in Nexus365 Teams is uploaded and saved to Stream after the recording ends. The default permissions for that recording are set with the person who made the recoding as the owner of the video and the Nexus 365 users who were on the meeting invite are set as viewers.
Please note that video owners have the ability to open their video up to all Nexus365 users. In the video permissions section, the owner can allow every Nexus365 user the permission to view their video
Only select this setting if you are sure you want to allow every Nexus365 user access to view your video.