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In that case you could have a look at the Snipd podcast app. They have Whisper built in :)

What tool did you use for the player-text presentation?

Mostly just vanilla JS on that page, and a tiny bit of Python glue code to turn the WebVTT output from Whisper into a data format for the JS.

It’s stunning how it just looks like a human written copy. The punctuation is close to perfect and I couldn’t find any transcription mistakes.