Runs three capture techniques against the same video and the same timestamp, so they can be
compared on time, bytes and output rather than argued about. Run it in every browser you support —
Chrome, Firefox, Safari, and a real iPhone.
Cache caveat for manual runs. Techniques run in sequence in one page, so the second
and third benefit from bytes the first already pulled. Press Run (cold) to append a cache-busting
parameter per technique, which is the fair comparison. The Playwright driver runs each in a fresh browser
context and needs no such trick.