Revoldiv (https://revoldiv.com/) transcribes an audio or video recording, and then allows it to be modified by editing the text.

Revoldiv converts speech into text, spots silences and extraneous noises, and can remove language tics.
Each cut or modification in the text has an impact on the editing. Possible creation of sound extracts to share, chapters to find your way in a long recording, and work with several people with comments.

Accepted files up to 300 MB and 2 hours.
Exports with audiograms in mp4, shared by url.

Free but usage limits not specified.

Sources:

• https://archive.org/details/MLKDream

• https://www.youtube.com/watch?v=1Rsj8mfQEeI