''I should have stayed in (the Army Reserve) longer," Mr Shorten said in the video.
''I was, I loved being a rifleman and learning all those skills. But somewhat fortunately Australia is guarded by really elite professional defence forces and reservists and I think to the relief
of the Army I stopped being a rifleman."
Responding to Mrs Shorten's question about how he spends his weekends, Mr Shorten said he liked to "sneak in the odd jog" and that he "generally" tried to make his wife happy.
There's a surprisingly formal tone to the video, which was filmed in a pub in Darwin.
Labor staffers enjoying a beer are visible in the background behind Mr Shorten.
It's the latest in a string of unusual campaign video released over the eight-week campaign.
Earlier this month the Prime Minister appeared in an advertisement waxing lyrical about his childhood and the influence of his father Bruce.
And Bob Katter last week attracted criticism for a video in which he shoots dead faceless members of the two major parties.