That appears to work. It was when viewing Jackie Lawson greeting cards that I first found this problem. Another site also, but I can't remember now what it was.
OK, but where is the flash which is working the Utube videos? I can't see it in my application/ library etc.
OK I understand that, but why should it have happened to me ( and clearly lots of other people) when I had not changed the Adobe flash player in any way and I had upgraded to Yosemite - as had all the others who are on the adobe forums
Ah well, such is life, you go for years with no problem and then when you have one no one can solve it. thank you anyway.