I didn't twig that Una Mullaly is in fact Una of Una Rocks. So I withdraw my comments about giving me a ring if she's single as she decidedly taken to the best of my knowledge.
And the Pelican has been in touch with me by mail since I posted (Christ how much like a line from Batman the TV series does that sound?). Seems the Pelican has only just logged into their account today, and discovered a mail dated last Wednesday from Una querying they have copyright clearance for the video. They were out of the country during the week and not checking mail.
I've done some quick searching and it seems this version of "Send in the clowns" is the Judy Collins recording which was a Warner Brothers release and it seems Warner have a deal with YouTube regard the posting of their music. So it's not clear if separate clearance for a posting of the song on YouTube is required. To the best of my knowledge the clip was constructed for use at an FG conference in 2005, and updated slightly for the 2006 Ard Fheis to include McDowell's remark's about Richard Bruton.
I'm not sure if monies would actually need to changes hands for its use on YouTbue but if it were then it would have to be at a rate comparable to what a radio station might have to pay for playing a single tune to a few thousand people. After all YouTube tracks the number who have played the clip, even if they don't track how many have listened to it in its entirety. So how much would that be? I've tried looking at the IRMA site for some information but there isn't any. Perhaps someone from IRMA can tell us what prices they charge?