Tero, I thought I might get that sort of response but as I mentioned I have tried different formats, different export settings, used different source footage all to no avail. In fact that video I used as an example I uploaded 3 weeks ago and it was fine so I guess something has changed either with Youtube or in my system but as I said I have uploaded numerous videos to various file sharing sites, all successful. I guess what I’m seeking is someone else who has had a problem with Youtube.
Steve