most of program1 is done, shape of program2, actual app to be started

program2/program2.sh

@@ -0,0 +1,14 @@
+set -euo pipefail
+SCRIPTS_DIR=$(dirname `realpath ${BASH_SOURCE[0]}`)
+
+export DANCE_VIDEOS_DB="${HOME}/Documents/.DanceVideos/db.sqlite"
+export DOSSIER_PLAYLIST="$(dirname $DANCE_VIDEOS_DB)/playlists"
+
+rm -rf $DOSSIER_PLAYLIST
+
+export PLAYLIST_ALL=$DOSSIER_PLAYLIST/all
+mkdir -p $PLAYLIST_ALL
+
+for v in $(sqlite3 $DANCE_VIDEOS_DB "select rotated_file from videos"); do
+    ln -s $v $PLAYLIST_ALL/$(basename $(dirname $v)).mp4
+done