To stream high-definition live video to hundreds of wireless users in a crowded area continues to be a formidable challenge. We present a network coding based solution that scales to more than 100 clients per WiFi hotspot using wireless multicast with a minimum amount of feedback. Our packet recovery mechanism takes into consideration no only the buffer states of the video clients but also the playout deadline of each individual packet, thus ensuring that each mobile player receives the right coded packet at the right time. The solution has been fully productized, bringing an 11x bandwidth improvement over standard commercial solutions based on multiple unicast sessions.