What should be happening is a small window opens at the bottom of the left sidebar (under your channels/direct messages/apps) The tiny window is sorta useless

What should be happening is a small window opens at the bottom of the left sidebar (under your channels/direct messages/apps) The tiny window is sorta useless except for mute/hangup, but you can undock it from the sidebar and make it much larger for video chat or screensharing.