I can’t hear the audio here, but I think the vowel of tha might be dropped here. Gaelic doesn’t like hiatus – two vowels one after another – that much and often reduces them to just one vowel (and when it doesn’t, it’s often indicated in writing with a gh, th, etc., eg. saoghal /sɯː.əl/, piuthar /pju.ər/).
So I think the speaker here might pronounce it closer to th’ e /he/ cunnartach than tha e /ha.e/ cunnartach – but it is always written as tha e, never
Compare how what is your name? is often written as dè an t-ainm a th’ ort? with th’ indicating that its vowel is dropped (instead of a tha ort – although that’s also used). Similarly càite a bheil and càit a bheil are two spellings of the same words, the second showing that the last vowel of càite is dropped.