Yeah, who would have thought that it was so simple. I spent a lot of time searching through the forums here for h.265. Seems it's been a topic here for a long time. Came up with no answer, then installed DaVinci Resolve and it was the same i.e. missing offline media ect. So did a Google search (happy birthday Google - 25 years old this month) for Resolve h.265 and landed at that video in my first post.

Take care, and thanks for the response.