He sounds okay, there were a coiuple of dodgy spots but the lyrics may just be different from the subtitles.

For Donegal Irish, I'd recommend Mairéad Ní Mhaonaigh, Máire Ní Bhraonáin (Moya Brennan), Mícheál Ó Domhnaill, Tríona Ní Dhomhnaill and Maighread Ní Dhomhnaill. The last three siblings were in Skara Brae and two of them were in the Bothy Band.

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WARNING: Intermediate speaker - await further opinions, corrections and adjustments before acting on my advice.
My "specialty" is Connemara Irish, particularly Cois Fhairrge dialect.
Is fearr Gaeilge ḃriste ná Béarla cliste, cinnte, aċ i ḃfad níos fearr aríst í Gaeilge ḃinn ḃeo na nGaeltaċtaí.
Gaeilge Chonnacht (GC), go háraid Gaeilge Chois Fhairrge (GCF), agus Gaeilge an Chaighdeáin Oifigiúil (CO).