diff --git a/examples/real_robot_example/0_record_training_data.py b/examples/real_robot_example/0_record_training_data.py
index 8c392941..6f483e4b 100644
--- a/examples/real_robot_example/0_record_training_data.py
+++ b/examples/real_robot_example/0_record_training_data.py
@@ -39,7 +39,9 @@ revision = args.revision
 
 out_data = DATA_DIR / repo_id
 
+# During data collection, frames are stored as png images in `images_dir`
 images_dir = out_data / "images"
+# After data collection, png images of each episode are encoded into a mp4 file stored in `videos_dir` 
 videos_dir = out_data / "videos"
 meta_data_dir = out_data / "meta_data"