InstaScript YouTube caption and transcript download measurements

This record contains the observed data and page implementation used for InstaScript's YouTube caption and transcript-download pages, measured on 2026-09-17. Contents:- youtube-transcript.md: caption-track sample rows and transcript-panel line and character counts.- youtube-transcript-download.md: TXT/SRT file-size measurements and method notes.- whisper-tiny-en-browser-benchmark.csv and README.md: raw browser benchmark timings, file bytes, and measurement method.- youtube-transcript.js and youtube-transcript-download.js: page implementation, including copy handling and Blob byte-size calculation. Measurements are single-run observations from one laptop, browser, and connection; the markdown files preserve the stated limitations and do not add estimates. Project page: https://instascript.app