Podcast. There is a transcript, which is in fine print and not concise.
For accessibility and personal preferences reasons, I wouldn't object to a HN policy change where podcasts are only allowed if they're accompanied by a readable transcript. Personally I still wouldn't read it because I don't like reading transcripts of podcasts that could be articles.
Not to excuse poor web design practices, but this is what CTRL+ or ⌘+ is for in most modern browsers.