Review + approve
Every incoming phone goes through a review queue first. You see a thumbnail, the UA, and three actions: Approve, Reject, Kick. Approved phones enter the active subscription pool the display mode draws from. Rejected phones see "Rejected by host" on their screen and their stream is closed server-side.
Display modes
Floating nodes: up to 16 audience cameras as floating tiles with subtle physics. Highlight one: a single audience feed full-screen, cycled on a configurable timer. Scan random: jump to a random approved phone every N seconds.
Scaling
Built on LiveKit Cloud (managed SFU). 5 GB egress / month free, then $0.004 per participant-minute — the 5-token-per-MB rate covers it comfortably. Each room currently pins to a single SFU worker; thousands of phones can connect, the renderer just subscribes selectively.