Building a "paste a YouTube link, get a transcript" feature sounds trivial until you deploy it to a server. The moment your request comes from a datacenter IP instead of a residential one, YouTube responds with LOGIN_REQUIRED or quietly serves nothing. Here's how VidTranscriber handles it.
Source: [Dev.to](https://dev.to/terryshine/how-to-transcribe-a-youtube-video-free-in-under-a-minute-co7)