For some reason youtube decided to disable
this video. I asked them why they had disabled it and although had no reply it now seems to be working again. I did notice someone had posted a rather crude comment (at least crude for youtube - which no longer shows) but I only got notified of that comment after the video had been pulled.
Would youtube disable a video because another user had posted an inappropriate comment? Surely they should take the flak, not me.
At least there was the right outcome in the end but nothing from youtube to tell me what happened...