The 3D effect is baked directly into the video file. The colors are intentionally distorted (fringed with red and blue) so that standard screens can display the depth when viewed through colored glasses.
left_frame[:, :, 2] = 0 # Set red channel to 0 for left frame right_frame[:, :, 0] = 0 # Set blue channel to 0 for right frame download anaglyph 3d movies