Thank you (and David279) for replying.
Firstly, there was a typo with the chip - I should have said 9600k which I believe does have igpu.
when I add the bit in extra parameters, Something like --device=/dev/dri:/dev/dri in Extra Parameters or /dev/dri as a container device
and then apply, it crashes and says that docker /dev/dri is not an absolute path.
Then I have to reinstall the docker and remove the additional path just to be able to run the container at all.
I have looked at using the linuxserver docker as used in the video guide but on the 1st step in the video, there are some options in the docker to choose the intel quicksync but when I load that docker, they don't appear.
Any thoughts?
Thanks very much.