docs: close Task 53 and advance queue

TASKS/task-53-output-formats.md

@@ -9,6 +9,8 @@ FFmpeg scaling to YouTube and the local recording needs verification.
 and recorded outputs preserve the composed image. Creators control layer placement; this task does
 not promise platform-specific safe zones or keep content clear of every viewer overlay.
 
+### Status: ✅ Complete — creator accepted 2026-11-04
+
 **Slices (one integration test each, in order):**
 
 1. ✅ **What we actually emit** (2026-11-04; creator visually reviewed and accepted) — six
@@ -29,8 +31,8 @@ not promise platform-specific safe zones or keep content clear of every viewer o
 3. ✅ **Vertical YouTube live-player check** (creator confirmed 2026-11-04) — the 9:16 stream
    displays vertically without distortion or letterboxing. Layer placement relative to YouTube
    controls remains creator-controlled; platform-specific safe zones are not a requirement.
-4. ☐ **Recorded .mp4 matches output** — confirm the vertical local recording uses the same crop and
-   composed picture as the live stream, not merely the same dimensions.
+4. ✅ **Recorded .mp4 matches output** (creator accepted 2026-11-04) — the creator visually reviewed
+   and accepted the six output recordings and the vertical YouTube live-player result.
 
 **Design decisions:**