Yes, one of those Youtube clips is from the festival in Dun Laoghaire where I saw the North Strand Klezmer Band (the North Strand is just North of Dublin city centre). Pity the sound was so bad where we were sitting.

I'm trying out one or two klezmer numbers in one of our sessions (on mandolin), to go with a couple of Yiddish songs I do. I was surprised that many people didn't know what Yiddish was, so I'm not going to try to explain Klezmer!