Hi Graham, this is not a problem at all as you said it is quite minimal and everyone will have very slight variations on the grip that feel comfortable and natural to them. As long as the key basics are there these small differences are fine, you’ve got a good grip there from what I see in the video so definitely not worth changing in my opinion.
The only thing I did notice and what I would say is try to have the soft part of your hand between your index finger and thumb, closer up and tighter into the blae, I can see with yours there is a slight gap there, this can really help the feeling of control and stability so worth trying that, as for the finger, no problems there 🙂 Cheers, Tom