Add groupvideos directory

videos/groupvideos/.gitkeep

@@ -0,0 +1,17 @@
+# This directory is for folder-based video sequences
+# Create subfolders here, each containing multiple videos
+# Videos in each folder will play sequentially when the NFC tag is scanned
+#
+# Example structure:
+#   groupvideos/
+#     LOTR/
+#       01_fellowship.mp4
+#       02_towers.mp4
+#       03_return.mp4
+#     Avengers/
+#       01_avengers.mp4
+#       02_ultron.mp4
+#       03_infinity.mp4
+#       04_endgame.mp4
+#
+# Map folders to NFC tags using videos/folder_mapping.txt