Help with building a tool that can fetch youtube transcripts.

I am trying to create a tool to fetch youtube transcripts, since this worked locally I wanted to test it out after deploying it to something like render or Cloudflare. I mainly wanted this integrated with a nocode website tool called Webflow.

The issue is whatever method I try it works locally but after deployment, YouTube doesn't allow the caption/transcripts to be downloaded. It gives 429 error, sufficient permissions not given error or this video has no transcripts (even though it has)

any idea on why this issue is? is there any other way?