Over the past five years, video conferencing support on websites and applications has exploded. Facebook, WhatsApp, FaceTime and Signal are just a few of the many ways that users can make audio and video calls across networks. This talk discusses the security of the most popular video conferencing solutions, including WebRTC, FaceTime and WhatsApp. It will describe the architecture of these solutions, how to instrument them for fuzzing as well as examples of vulnerabilities found so far.