The remoteId property of the RTCInboundRtpStreamStats dictionary specifies the id of the RTCRemoteOutboundRtpStreamStats object representing the remote peer's RTCRtpSender which is sending the media to the local peer.
remoteId
RTCInboundRtpStreamStats
id
RTCRemoteOutboundRtpStreamStats
RTCRtpSender
A string.