diff --git a/trailer.html b/trailer.html
index cfde1fb..edf378c 100644
--- a/trailer.html
+++ b/trailer.html
@@ -1505,7 +1505,7 @@
       + from
       + ' <span style="margin-left:10px"><b style="color:var(--ink)">Motion</b> '
       + (s.motion_from ? '<span class="tiny">follows shot ' + esc(s.motion_from.shot) + '\'s clip (direction of travel, camera side, pace)</span> <button type="button" class="btn small ghost" data-useframe="nomotion|' + esc(s.id) + '">stop following</button>'
-         : '<button type="button" class="btn small ghost" data-useframe="motion|' + esc(s.id) + '"' + (p.clip_url ? '' : ' disabled title="Shot ' + esc(p.id) + ' has not been filmed yet"') + ' title="The previous shot\'s clip is sent to the video model as a reference for direction of travel, camera side and pace">Carry the motion of shot ' + esc(p.id) + '</button>')
+         : '<button type="button" class="btn small ghost" data-useframe="motion|' + esc(s.id) + '"' + (p.clip_url ? '' : ' disabled title="Shot ' + esc(p.id) + ' has not been filmed yet"') + ' title="The previous shot\'s clip is sent to the video model as a motion reference. Measured: it also brings that clip\'s scenery and actions back - use it to copy a camera move, not for continuity; for continuity use its last frame">Copy the movement of shot ' + esc(p.id) + '</button>')
       + '</span></div>';
   }