A method, comprising: outputting, to a plurality of video conference participants (A, B, C, D, E), a corresponding plurality of encoded video frames, each encoded video frame being output from a respective one of a corresponding plurality of encoders (340A, 340B, 340C, 340D, 340E) to a respective one of the plurality of video conference participants (A, B, C, D, E), wherein each encoded video frame includes a first portion of the video frame and a second portion of the video frame, in which the first portion of the video frame contains the same video data for each of the plurality of video conference participants as encoded by a shared encoder of the plurality of encoders, and in which the second portion of the video frame is uniquely encoded by the respective encoder (340A, 340B, 340C, 340D, 340E) of the plurality of encoders for each of the respective video conference participants (A, B, C, D, E); receiving a video error indication from at least one of the plurality of video conference participants (A, B, C, D, E); and in response to the received video error indication, instructing the plurality of encoders (340A, 340B, 340C, 340D, 340E) to perform resynchronization, wherein the resynchronization is performed irrespective of whether the video error indication is due to an error in the first portion or in the second portion of the video frame; wherein the resynchronization further comprises either: instructing the shared encoder and each of the plurality of encoders to generate a keyframe that has no dependence on any previous frames of video, and sending, by each of the respective encoders, to the respective video conference participant (A, B, C, D, E) the keyframe; or: using receipt of acknowledgements from receivers to determine a respective known-good recently-sent video frame from recently sent frames stored in a buffer at each of the respective encoders, encoding a new frame by each of the respective encoders using the determined respective known-good recently-sent video frame, and sending, by each of the respective encoders, to the respective video conference participant (A, B, C, D, E) the new frame. outputting, to a plurality of video conference participants (A, B, C, D, E), a corresponding plurality of encoded video frames, each encoded video frame being output from a respective one of a corresponding plurality of encoders (340A, 340B, 340C, 340D, 340E) to a respective one of the plurality of video conference participants (A, B, C, D, E), wherein each encoded video frame includes a first portion of the video frame and a second portion of the video frame, in which the first portion of the video frame contains the same video data for each of the plurality of video conference participants as encoded by a shared encoder of the plurality of encoders, and in which the second portion of the video frame is uniquely encoded by the respective encoder (340A, 340B, 340C, 340D, 340E) of the plurality of encoders for each of the respective video conference participants (A, B, C, D, E); receiving a video error indication from at least one of the plurality of video conference participants (A, B, C, D, E); and in response to the received video error indication, instructing the plurality of encoders (340A, 340B, 340C, 340D, 340E) to perform resynchronization, wherein the resynchronization is performed irrespective of whether the video error indication is due to an error in the first portion or in the second portion of the video frame; wherein the resynchronization further comprises either: instructing the shared encoder and each of the plurality of encoders to generate a keyframe that has no dependence on any previous frames of video, and sending, by each of the respective encoders, to the respective video conference participant (A, B, C, D, E) the keyframe; or: using receipt of acknowledgements from receivers to determine a respective known-good recently-sent video frame from recently sent frames stored in a buffer at each of the respective encoders, encoding a new frame by each of the respective encoders using the determined respective known-good recently-sent video frame, and sending, by each of the respective encoders, to the respective video conference participant (A, B, C, D, E) the new frame.