Fix not returning the video with added noise

There's an option to add the noise to the original frames. However, after adding gaussian noise, the function returns the original frames.

Author: karlic-luka

tutorials/tutorial12/tutorial-12-cdmd.py

@@ -121,7 +121,7 @@ def get_video_dmd(
     if noise:
         vid += np.random.normal(0, noise_amt, vid.shape)
         vid = vid.clip(0, 1)
-    return np.vstack(imgs).T, shape
+    return vid, shape
 
 
 def get_video(object: str = "frog") -> np.ndarray: