1. A device, comprising: a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, comprising: obtaining video media content, wherein the video media content comprises images, audio content, and closed captioning of text from the audio content; detecting an occurrence of a textual phrase in the closed captioning data of the video media content as a detected occurrence; obtaining an audio segment from the audio content corresponding to the textual phrase as a selected audio segment; computing a phonetic transcription for the selected audio segment as a computed transcription; selecting, from a speech recognition library, a plurality of identified phonetic transcriptions associated with the textual phrase, wherein the speech recognition library comprises audio pronunciation data for the textual phrase and identified phonetic transcriptions of the textual phrase; comparing the computed transcription with the plurality of identified phonetic transcriptions from the speech recognition library; determining if the computed transcription differs from the plurality of identified phonetic transcriptions from the speech recognition library; and responsive to determining that the computed transcription differs from the plurality of identified phonetic transcriptions, adding the computed transcription and the textual phrase to the audio pronunciation data in a group of the plurality of identified phonetic transcriptions in the speech recognition library.