diff --git a/Makefile b/Makefile
index 3e56a2821..c1af01d7a 100644
--- a/Makefile
+++ b/Makefile
@@ -68,6 +68,10 @@ bump-lazycore:
 record-demo:
 	demo/record_demo.sh $(filter-out $@,$(MAKECMDGOALS))
 
+.PHONY: rerecord-demos
+rerecord-demos:
+	demo/rerecord_demos.sh $(filter-out $@,$(MAKECMDGOALS))
+
 .PHONY: vendor
 vendor:
 	go mod tidy && go mod vendor
diff --git a/demo/rerecord_demos.sh b/demo/rerecord_demos.sh
new file mode 100755
index 000000000..db5c7140c
--- /dev/null
+++ b/demo/rerecord_demos.sh
@@ -0,0 +1,113 @@
+#!/bin/sh
+
+set -e
+
+# Re-records the demos that a page embeds and points the page at the new
+# videos. Use it when a change to demo/settings.tape, or to lazygit's
+# appearance, leaves the existing recordings looking out of date.
+#
+# A page names the demo behind each video in a comment above it:
+#
+#   <!-- demo: commit_and_push -->
+#   <video src="https://github.com/user-attachments/assets/..." controls></video>
+#
+# GitHub drops that comment when it renders the page, so it costs the reader
+# nothing. This script re-records the demo the comment names and rewrites the
+# URL on the line below it.
+
+usage() {
+    echo "Usage: $0 [--no-upload] [page ...]"
+    echo "e.g. $0 README.md"
+    echo
+    echo "Re-records every demo the given pages embed. With no page given,"
+    echo "that means README.md."
+    echo
+    echo "--no-upload leaves the videos in demo/output and the pages untouched,"
+    echo "which is what you want for reviewing a change to demo/settings.tape."
+    exit 1
+}
+
+NO_UPLOAD=
+
+if [ "$1" = "--no-upload" ]
+then
+    NO_UPLOAD=--no-upload
+    shift
+fi
+
+if [ "$1" = "-h" ] || [ "$1" = "--help" ]
+then
+    usage
+fi
+
+if [ ! -x demo/record_demo.sh ]
+then
+    echo "Run this from the root of the repository."
+    exit 1
+fi
+
+if [ "$#" -eq 0 ]
+then
+    set -- README.md
+fi
+
+for PAGE in "$@"
+do
+    if [ ! -f "$PAGE" ]
+    then
+        echo "$PAGE does not exist"
+        exit 1
+    fi
+
+    NAMES=$(sed -n 's/^<!-- demo: \([A-Za-z0-9_]*\) -->$/\1/p' "$PAGE")
+
+    if [ -z "$NAMES" ]
+    then
+        echo "$PAGE embeds no demos. Each video needs a <!-- demo: <name> -->"
+        echo "comment on the line above it to say which demo it came from."
+        exit 1
+    fi
+
+    for NAME in $NAMES
+    do
+        TEST="pkg/integration/tests/demo/$NAME.go"
+
+        if [ ! -f "$TEST" ]
+        then
+            echo "$PAGE asks for a demo called $NAME, but $TEST does not exist"
+            exit 1
+        fi
+
+        echo
+        echo "=== $NAME ==="
+
+        if [ -n "$NO_UPLOAD" ]
+        then
+            demo/record_demo.sh --no-upload "$TEST"
+            continue
+        fi
+
+        # Keep the recording chatter on screen, since a full run takes a while,
+        # and read the new URL back out of it afterwards.
+        LOG=$(mktemp)
+        demo/record_demo.sh "$TEST" | tee "$LOG"
+        URL=$(sed -n 's/.*<video src="\([^"]*\)".*/\1/p' "$LOG")
+        rm -f "$LOG"
+
+        if [ -z "$URL" ]
+        then
+            echo "Recording $NAME produced no URL"
+            exit 1
+        fi
+
+        awk -v marker="<!-- demo: $NAME -->" -v url="$URL" '
+            hit { sub(/src="[^"]*"/, "src=\"" url "\""); hit = 0 }
+            $0 == marker { hit = 1 }
+            { print }
+        ' "$PAGE" > "$PAGE.new"
+
+        mv "$PAGE.new" "$PAGE"
+
+        echo "$PAGE now points at $URL"
+    done
+done
diff --git a/docs-master/dev/Demo_Recordings.md b/docs-master/dev/Demo_Recordings.md
index 67626ec4c..29b835f32 100644
--- a/docs-master/dev/Demo_Recordings.md
+++ b/docs-master/dev/Demo_Recordings.md
@@ -106,3 +106,26 @@ every recording.
 
 Uploading needs push access to the lazygit repository. If you don't have it,
 record the demo, then ask a maintainer to upload the mp4 for you.
+
+### Re-recording every demo on a page
+
+Write the name of the demo above each video, so that we can find our way from
+a page back to the demo that produced it:
+
+```html
+<!-- demo: commit_and_push -->
+<video src="https://github.com/user-attachments/assets/<uuid>" controls></video>
+```
+
+GitHub drops the comment when it renders the page. With it in place, a change
+to `demo/settings.tape` or to lazygit's own appearance can be rolled out across
+every recording at once:
+
+```sh
+scripts/rerecord_demos.sh
+# or, to look before you upload anything:
+scripts/rerecord_demos.sh --no-upload
+```
+
+That re-records every demo the README embeds and rewrites each URL in place.
+Name other pages as arguments to do the same for them.
diff --git a/justfile b/justfile
index 0851179b9..07f4a9f9e 100644
--- a/justfile
+++ b/justfile
@@ -74,5 +74,9 @@ bump-gocui:
 demo *args:
     demo/record_demo.sh {{ args }}
 
+# Re-record every demo the README embeds
+rerecord-demos *args:
+    demo/rerecord_demos.sh {{ args }}
+
 vendor:
     go mod tidy && go mod vendor
diff --git a/scripts/rerecord_demos.sh b/scripts/rerecord_demos.sh
new file mode 100755
index 000000000..f99f2e3f1
--- /dev/null
+++ b/scripts/rerecord_demos.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+demo/rerecord_demos.sh "$@"