We need a longer clip for the test to work correctly.

tests/test_VideoFileClip.py

@@ -46,7 +46,7 @@ def test_shallow_copy():
     """Call a function which uses @outplace
        and verify that making a shallow copy and deleting it
        does not corrupt the original clip."""
-    video_file = 'media/big_buck_bunny_432_433.webm'
+    video_file = 'media/big_buck_bunny_0_30.webm'
     video = VideoFileClip(video_file)
     video_copy = video.set_start(1)
     del(video_copy)