A video streaming system includes a handheld computing device that asynchronously streams video to a storage subsystem. The handheld computing device receives and buffers video data of contiguous video samples and, after a predefined amount of contiguous video samples has been buffered, assigns an index for that predefined amount of contiguous video samples and asynchronously transmits the index and those contiguous video samples to a storage subsystem of a broadcast server system. The handheld computing device, upon determining that the predefined amount of contiguous video samples has been received by the storage subsystem, transmits a notification message to an application server of the broadcast server system that includes the assigned index and indicates that the corresponding contiguous video samples are stored on the storage subsystem. The notification message causes the application server to fetch those video samples according to the index and process them for broadcasting to client computing devices.