Calls within Team can be joined by anyone on the Team unless private. Calls within Channel can be joined by any member of the channel. Recordings for one on one calls are available to participants only while recordings in channels are available to all channel members even if they did not participate.
how it works
Public channels and are visible and accessible to all on your team. Public channel can be converted into a private channel but a private channel cannot ever be converted into a public channel.
How it works
For sensitive or confidential collaborations, you can use private channels. All conversations, texts, media, recordings based on voice and video conferences are kept within a private channel. Only team members who are invited can view the channel and it's contents.