Is the description for a video grammatically correct:
Deep insights into our daily labour as chemists: Have fun!
I didn't find the expression daily labour in the Corpus of Contemporary American English.
Is it better to write:
Deep insights into our daily work as chemists ;-7 Have fun!"
;-7 declares the irony.
As a sentence fragment, omitting the expected introductory clause "This is a video which shows", it's grammatical. There's nothing about "daily labour" which is any different grammatically to "daily work".
Labour connotes expending far more effort than simple work, so the collocation is intended to be mildly amusing. Daily labour doesn't occur in print very often, but it might bring to mind something like...
... a chain gang.
The use of daily labour when the work as a chemist is nothing like as hard as that is ironic, and doesn't need to be marked with emoticons, even if the source of the quote is a place where emoticons would not be out of place.
Emoticons don't reduce the emotion they indicate: they indicate that that emotion is intended. So using it in the way your edited question suggests is not feasible. Using daily work already doesn't have the irony that daily labour has. There might be a case for retaining it to make clear that a statement is deliberately ironic; there's no case for using it where a statement is not ironic at all.
[Image: I am a Fugitive from a Chain Gang (Warner Bros, 1932) via Peak Oil]
