re: the boot intro and the attract loop are the same video, and the

new-game intro has a name

Q9, answered twice over -- once from the disc and once from frames I had
already captured and not used.

The movie manifest's first eight slots are the whole boot-side flow, and
the slot key is the role: LOGO1-4 -> logo1-4.wmv (not on the disc, which
is why the splash is a screen), ADVERTISE_MOVIE -> ADV.wmv, STAFF_ROLL ->
the credits reel, MS00A -> S00A.wmv, MS01A -> S01A.wmv. So the new-game
intro is S00A.wmv, decoded -- which is the half I could not test at
runtime, because A on NEW GAME hangs the emulator.

And there is no separate boot-intro slot: ADV.wmv IS the advertise movie,
the boot just plays it first. Confirmed independently by matching 19
attract frames against five candidates -- 15 hit ADV with a playhead that
advances monotonically at the sampling rate and ends at 137 s, its full
length, with the title back on the next sample. So the attract movie
plays to its end; nothing cuts it short.

That corrects me. Two iterations ago I recorded the attract movie as
"~85 s, so probably not ADV.wmv" -- arithmetic on a start I never
observed, since sampling began 39 s in. REFUTED and METHOD both take it,
along with the matcher's real failure mode: a near-black frame has no
signature, and its runner-up is not evidence.

Skippability I did NOT settle, and the corpus contradicts itself: one
page says A skips a movie every time, while the boot harness deliberately
never taps during one because it breaks the title. Named the one-boot
test rather than picking a side.

docs/re/METHOD.md

@@ -160,3 +160,12 @@ agent's loop prompt, i.e. nowhere durable. See [`README.md`](README.md) for the
   counts — they pin each wave's join exactly, so a straddle can be realigned
   rather than thrown away. 4 of 32 BGM banks look like counterexamples until this
   is applied.
+* **Do not time a video whose start you did not see.** An attract cycle sampled
+  from partway through measured "≈85 s", which was used to argue it was not the
+  137 s `ADV.wmv`. It was `ADV.wmv`; the sampling began 39 s in. Identify a video
+  by **content** — match frames against the candidates and check the matched
+  playhead advances monotonically — before reasoning about its duration.
+* **A near-black frame has no signature.** In frame-matching, low-contrast frames
+  drive every correlation toward zero and the ranking becomes noise; one control
+  frame scored 0.000 and another tied the wrong movie at 0.98. Read a dark
+  frame's runner-up as *no evidence*, not as evidence for the runner-up.