# Subtitle errors versus editorial warnings: a recorded local walkthrough

A continuous local browser recording using original fictional subtitle fixtures. Follow the corpus expectations, test an invalid timestamp, inspect valid WebVTT settings and intentional overlap, and finish with the clean control. Caption-led; no speech. This is not a vendor export or playback/accessibility certification.

00:00:01,571 — Twenty original subtitle fixtures. Predict the finding before running the checker.

00:00:18,774 — Out-of-range seconds are a structural problem. Read the expected finding first.

00:00:36,849 — Choose the same fictional file in the existing local subtitle checker.

00:00:54,116 — The report identifies malformed timing. Repair the source and check the edited copy.

00:01:11,299 — Valid WebVTT cue settings are accepted. Their visual appearance is outside this check.

00:01:28,481 — Intentional overlap is an editorial warning. It is not automatically malformed syntax.

00:01:45,614 — The clean control has no parser findings. Playback and accessibility still need review.

00:02:02,816 — Use the corpus as a reproducible text exercise—not a real export or playback test.