There is no recourse for attendees when the content shared in a multimedia panel freezes but to logout of the meeting and rejoin or for the host to re-share the multimedia panel from scratch. Re-sharing from scratch and logging out of the meeting and rejoining causes the previous shared content to reset. Please consider including a refresh button so that if it stalls the user can pickup where he/she left off without having to rejoin or for the host to have to restart the panel.