Thanks so much for your quick response!
I didn’t realise that motion blur was the solution to this but I can see now that it is!
I was so used to using 60FPS before animation I didn’t think anything of it, would it be better to use 30FPS instead?
So as I’m using cameras and 3D layers to create a depth of field in the motion, should I just apply the motion blur to all the objects which are actually keyframed to move, or the cameras too?
I would use Vimeo but YouTube was the preference for the person I’m creating animations for!
Thanks again!