diff --git a/README.md b/README.md
index 7d564d9a..8bfdb0a0 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ npm run build        # writes dist/ and regenerates index.html; the folder is wh
 The browser suite and the three example games need a machine with a GPU:
 
 ```bash
-node tools/seed-e2e.mjs && node tools/e2e.mjs      # the editor, 2002 checks (GM_STEPS=20 for one step)
+node tools/seed-e2e.mjs && node tools/e2e.mjs      # the editor, 2003 checks (GM_STEPS=20 for one step)
                                                    #   every tool signs in first – see the Accounts page
 node tools/seed-jumprun.mjs && node tools/smoke-jumprun.mjs
 node tools/seed-tetris.mjs && node tools/smoke-tetris.mjs
diff --git a/src/viewport/VideoLibrary.ts b/src/viewport/VideoLibrary.ts
index c5704c12..45a06e94 100644
--- a/src/viewport/VideoLibrary.ts
+++ b/src/viewport/VideoLibrary.ts
@@ -148,7 +148,8 @@ export class VideoLibrary {
       target: drivenTimeOf(play, drive.time, element.duration),
       speed: drive.reading?.speed ?? 0,
       current: element.currentTime,
-      end: play.end,
+      // A video that ran to the end of its file starts over from its first picture on play().
+      end: element.ended ? element.currentTime : Math.min(play.end, element.duration),
     });
     if (step.seek !== null) this.seek(element, drive, step.seek);
     if (step.kind === 'hold') {
diff --git a/tools/e2e/66-video.mjs b/tools/e2e/66-video.mjs
index d0ecf7d0..61415be4 100644
--- a/tools/e2e/66-video.mjs
+++ b/tools/e2e/66-video.mjs
@@ -381,6 +381,35 @@ export async function video(t) {
       JSON.stringify(await rowKeys()) === keyed,
     JSON.stringify({ ran, steps, duration: uploaded.duration, undone: await rowKeys() }),
   );
+
+  // 66o. Played once to 1.95 s, the video runs on past the end of its file while the time still
+  //      reads as moving. play() on an ended video starts it over from its first picture, and red
+  //      flashed two or three times before the white of the last frame stood. Every frame is read in
+  //      the page.
+  await mutate(`
+    const cut = __gm.state.project.assets.find((a) => a.id === '${CUT}');
+    cut.props.playback = 'once';
+    cut.tracks[0].keys = [{ frame: 0, value: 0.05 }, { frame: 19, value: 1.95 }];`);
+  await t.evaluate('__gm.animation.scrub(0)');
+  await waitFor(previewColor, (color) => color === COLORS.red, 10);
+  await t.evaluate(`window.__vd66 = [];
+    (function read() {
+      const player = __gm.videos().find((v) => v.key.includes('@') && !v.key.includes('${EARLY}') && !v.key.includes('${LATE}'));
+      if (player) window.__vd66.push(Math.round(player.time * 1000) / 1000);
+      if (window.__vd66.length < 400) requestAnimationFrame(read);
+    })();`);
+  await click(playCut.x, playCut.y);
+  await sleep(2800);
+  const times = await json('window.__vd66.splice(0)');
+  const endColor = await previewColor();
+  if ((await json('__gm.animation.playAt()')).text !== 'Play') await click(playCut.x, playCut.y);
+  const reached = times.findIndex((time) => time >= 1.8);
+  const fellBack = reached < 0 ? [] : times.slice(reached).filter((time) => time < 1.5);
+  check(
+    'a video played once to its last frame stays there and never shows its first picture again',
+    reached >= 0 && fellBack.length === 0 && endColor === COLORS.white,
+    JSON.stringify({ reached, fellBack, last: times.slice(-5), frames: times.length, endColor }),
+  );
   await showTab('scene');
 
   // 66m. Switched off, a driven sprite keeps its player ready at its Video time, longer than a player