Autodate CritRole. It is not 100% accurate but it should generally be good enough.

yt/autodate.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# Move into place if a directory is provided
+if [ -n "${1}" ]; then
+	if [ -d "${1}" ]; then
+		cd "${1}"
+	else
+		echo "Usage: ${0} [path]" 1>&2
+		exit 1
+	fi
+fi
+
+# Scan for media files
+for i in *.mp4 *.mkv *.m4v; do
+	YTID="`echo "${i}" | sed 's%^S20[0-9][0-9]E[0-9]* - \(.*\)\.m[pk4][4v]%\1%'`"
+	if [ -z "${YTID}" ] || [ "${YTID}" == "${i}" ]; then
+		continue
+	fi
+
+	# Find related meta files
+	META="${YTID}.meta"
+	if [ -s "${META}" ]; then
+		continue
+	fi
+
+	# Find the media file mtime
+	DATE="`stat -c '%Y' "${i}"`"
+	if [ -z "${DATE}" ]; then
+		echo "Could not determine date for: ${i}" 1>&2
+		continue
+	fi
+
+	# Add missing meta files
+	echo "# Autogenerated" > "${META}"
+	echo "date = ${DATE}" >> "${META}"
+	touch -r "${i}" "${META}"
+done

yt/critrole.pl

@@ -149,5 +149,14 @@ if ($DEBUG) {
 	close($fh);
 }
 
+# Autodate
+my @autodate = ($ENV{'HOME'} . '/bin/video/yt/autodate.sh');
+if (can_run($autodate[0])) {
+	if ($DEBUG) {
+		print STDERR "Executing autodate script...\n";
+	}
+	system(@autodate);
+}
+
 # Cleanup
 exit(0);