04/25/2013 04:51 pm ET | Updated Apr 28, 2013

Isaac Lamb's New Video Celebrates Grandparents Who Said 'Yes' To Love (VIDEO)

Here's what happens when you say "yes" to love.

Isaac Lamb, who proposed to his girlfriend Amy Frankel in a viral video called "Isaac's Live Lip-Dub Proposal" in 2012, has returned to YouTube with a new video that explores the impact of his grandparents' relationships on his life.

In the video, originally posted on YouTube on Valentine's Day and shared to Reddit Thursday, Lamb's family members hold up photos of his four grandparents as captions describe how they fell in love. Then, many of his grandparents' 14 children, 40 grandchildren and 35 great-grandchildren appear, revealing the amazing legacy left by the two couples.

Watch the entire video above.

Lamb and Frankel have also made impossibly cute videos of themselves singing together.

See long-married couples then and now in the slideshow below.

Married Couples: Then And Now

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