It seems that Robin is very busy doing tutorials at the moment. Here he shows his approach to the well known song Wild Mountain Thyme. The crosspicking pattern he shows can be used to accompany lots of more songs in 3/4 time. Even Daoiri Farrell uses it a lot, e.g. in his song Creggan White Hare.
This is part 1 of the tutorial. If you want to go further you can get it here.
Edit: I bought part 2 yesterday. I think, it's really worth it. You get 11 videos in which Robin shows and explains the arrangement line by line. Some of them are really short, where he plays one line, others are longer where he gives some tips for playing. In the last video he shows how to play this arrangement to a metronome, which is important to play in time. So I'd really would like to encourage you to buy this tutorial if you are interested in accompanying songs.