Maneesh Agrawala [1] and his group has done lots of similar work with the same basic idea of editing audio or narrated video as if it's text:

* Content-Based Tools for Editing Audio Stories [2] (the software is released as an open-source project called speecheditor [3])

* Text-Based Editing of Talking-head video [4]

* QuickCut: An Interactive Tool for Editing Narrated Video [5]

[1]: https://graphics.stanford.edu/~maneesh/

[2]: http://vis.berkeley.edu/papers/audiostories/

[3]: https://ucbvislab.github.io/speecheditor/

[4]: https://www.ohadf.com/projects/text-based-editing/

[5]: https://graphics.stanford.edu/projects/quickcut/