Many Republican strategists say Romney is suffering from a likeability problem, and some have called for his wife to play a bigger part of the campaign to help humanize him. She regularly introduces him on the campaign trail and has been used in prior videos to soften his image.
The video features home movies and photos of the Romney family from bygone days.
"They are the joy of our life. I miss having all of them under one roof all the time," she says. "I would love to go back in time and see all of those five boys under one roof again."