This tune is a slide.
The time signature is 12/8, which means basically 12 quavers per bar, but more correctly 4 groups of either quavers or crotchet/quaver combinations.
A traditional Irish musician would count 4 beats per bar, each count being for 3 quavers or the equivalent: so *1* 2 3, *2* 2 3, *3* 2 3, *4* 2 3. Slides are often played very fast and are used for set dancers, and are widely played around Kerry and Cork.
Tony reminds us not to try to play too fast.