Stuart,
Did you ever get a solution? I too am running Hass on an IMac with pretty good success. I can also see my video feed with VLC, but still no luck with Home Assistant. Anything you’ve learned along the way would be helpful. Thanks.
kartcon (Art)
I gave up on this, and revisited using the generic camera platform. At some point it there was an update so that it worked out of the box with my hikvision cameras.