1. A method for transcribing speech in a communication session comprising: receiving, by one or more processors, a combined media stream comprising a plurality of media sub-streams each associated with one of a plurality of end user devices, wherein each of the plurality of media sub-streams in the combined media stream comprises a respective video component and a respective audio component; for each of the plurality of media sub-streams, separating, by the one or more processors, the respective audio component from the respective video component; for each separate audio component, transcribing, by the one or more processors, at least a portion of speech from the audio component to text; and annotating the text for the audio component of each respective media sub-stream to include additional content, wherein annotating the text comprises: determining one or more keywords of the text; selecting, based on the one or more keywords, one or more advertisements or a link; and providing the one or more advertisements or the link in association with at least a portion of the text.