A method of operating a portable media streaming device, the method comprising: transmitting, via a first network, using the portable media streaming device, to one or more receiving terminals (111, 112), first frames of video captured by the portable media streaming device; determining, at the portable media streaming device, after transmission of the first frames of the video, that a signal strength associated with the first network falls below a predetermined threshold; identifying one or more objects of interest in second frames of the video captured by the portable media streaming device after the first frames, the one or more objects identified using one or more of video analytics on the second frames and audio analytics on audio of the second frames; after the one or more objects of interest are identified, generating, at the portable media streaming device, audio summarization data corresponding to the one or more objects, the audio summarization data comprising an audio description that describes the one or more objects identified in the second frames of the video; selecting, at the portable media streaming device, a portion of the audio summarization data based on a context associated with a receiving terminal of the one or more receiving terminals (111, 112), the portion of the audio summarization data comprising an identifier of the context; and transmitting, via one or more of the first network and a second network, at the portable media streaming device, the portion of the audio summarization data to all of the one or more receiving terminals (111, 112), the identifier of the context being configured for use in filtering the portion of the audio summarization data at each of the one or more receiving terminals (111, 112). transmitting, via a first network, using the portable media streaming device, to one or more receiving terminals (111, 112), first frames of video captured by the portable media streaming device; determining, at the portable media streaming device, after transmission of the first frames of the video, that a signal strength associated with the first network falls below a predetermined threshold; identifying one or more objects of interest in second frames of the video captured by the portable media streaming device after the first frames, the one or more objects identified using one or more of video analytics on the second frames and audio analytics on audio of the second frames; after the one or more objects of interest are identified, generating, at the portable media streaming device, audio summarization data corresponding to the one or more objects, the audio summarization data comprising an audio description that describes the one or more objects identified in the second frames of the video; selecting, at the portable media streaming device, a portion of the audio summarization data based on a context associated with a receiving terminal of the one or more receiving terminals (111, 112), the portion of the audio summarization data comprising an identifier of the context; and transmitting, via one or more of the first network and a second network, at the portable media streaming device, the portion of the audio summarization data to all of the one or more receiving terminals (111, 112), the identifier of the context being configured for use in filtering the portion of the audio summarization data at each of the one or more receiving terminals (111, 112).