diff --git a/momaland/envs/crazyrl/catch/catch.py b/momaland/envs/crazyrl/catch/catch.py
index 6a1715f1..4de7ee4e 100644
--- a/momaland/envs/crazyrl/catch/catch.py
+++ b/momaland/envs/crazyrl/catch/catch.py
@@ -91,7 +91,7 @@ class Catch(CrazyRLBaseParallelEnv, EzPickle):
     - `target_speed (float, optional)`: Distance traveled by the target at each timestep
 
     ## Credits
-    The code was adapted from [Felten's source](https://github.com/ffelten/CrazyRL).
+    The code was adapted from [Felten's source](https://github.com/ffelten/CrazyRL). See also the YouTube video [here](https://www.youtube.com/watch?v=4FeTjZnpgJI&t=4s&ab_channel=FlorianFelten).
     """
 
     metadata = {"render_modes": ["human"], "name": "catch_v0", "is_parallelizable": True, "render_fps": FPS}
diff --git a/momaland/envs/crazyrl/escort/escort.py b/momaland/envs/crazyrl/escort/escort.py
index ab0329c7..3fb1472f 100644
--- a/momaland/envs/crazyrl/escort/escort.py
+++ b/momaland/envs/crazyrl/escort/escort.py
@@ -93,7 +93,7 @@ class Escort(CrazyRLBaseParallelEnv, EzPickle):
     - `num_intermediate_points (int, optional)`: Number of intermediate points in the target trajectory
 
     ## Credits
-    The code was adapted from [Felten's source](https://github.com/ffelten/CrazyRL).
+    The code was adapted from [Felten's source](https://github.com/ffelten/CrazyRL). See also the YouTube video [here](https://www.youtube.com/watch?v=4FeTjZnpgJI&t=4s&ab_channel=FlorianFelten).
     """
 
     metadata = {"render_modes": ["human"], "name": "escort_v0", "is_parallelizable": True, "render_fps": FPS}
diff --git a/momaland/envs/crazyrl/surround/surround.py b/momaland/envs/crazyrl/surround/surround.py
index 43d1a116..1b265144 100644
--- a/momaland/envs/crazyrl/surround/surround.py
+++ b/momaland/envs/crazyrl/surround/surround.py
@@ -92,7 +92,7 @@ class Surround(CrazyRLBaseParallelEnv, EzPickle):
     - `num_intermediate_points (int, optional)`: Number of intermediate points in the target trajectory
 
     ## Credits
-    The code was adapted from [Felten's source](https://github.com/ffelten/CrazyRL).
+    The code was adapted from [Felten's source](https://github.com/ffelten/CrazyRL). See also the YouTube video [here](https://www.youtube.com/watch?v=4FeTjZnpgJI&t=4s&ab_channel=FlorianFelten).
     """
 
     metadata = {"render_modes": ["human"], "name": "surround_v0", "is_parallelizable": True, "render_fps": FPS}