“having already written the article made it so easy to just put it out there and it made it equally easy to create subtitles and transcripts since I was reading from a script and when I then added video to all this the same principle applied the article served as the script and the transcript later”

Write once, ship as four formats

Solo creators can't produce each format from scratch. Write the article first, narrate it verbatim for the podcast, film yourself reading it for video, and reuse the same text as subtitles and transcript. One asset, four channels, near-zero marginal effort once the workflow is set up — this is what makes multi-format publishing economic for one person.