She doesn't pronouce the s in shùil ? Or am i hearing it wrong
sh, the lenited s in Gaelic, has the same sound as h /h/, so do shùil sounds /də huːl’/.
(but beware, after the article an s is lenited to t-s /t/ instead, eg. an t-sùil /ən tuːl’/ the eye)
AFAIK It's a silent 's' thanks to the lenition, caused by 'do'.
Surely others can explain it more eloquently than that. :)