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The YouTube feedback loop is a phenomenon that occurs when you watch a feel-good YouTube video, and feel compelled to watch similar videos for what could be considered an unhealthy amount of time.
There are several categories of videos that cause feedback loops, such as "Mom, Dad, we're pregnant" videos, engagement videos, the "Kids, we're going to Disney World.. now" videos, and "Surprise homecoming" videos.
In honor of Fathers Day, here are 10 videos of fathers who were deployed overseas, coming home to surprise their children. The joy in these videos is palpable.