How would I add motion blur to a cycles render scene? I have tried looking for youtube tutorials and using the vector blur node but nothing seems to work.
Enable motion blur in the properties window:
Be ready to increase the number of samples as well when you use motion blur.
For more information on all of the many options for motion blur please read the bmanual: https://docs.blender.org/manual/en/latest/render/cycles/render_settings/motion_blur.html