If this one doesn't give you a warm feeling, you might want to get a check up. Pianist (and frequent YouTube contributor) Jason Lyle Black wanted to do something special for his eighty year old grandparents as they approached their 60th wedding anniversary. So, he wrote a musical arrangement for them knowing that they had played duets together for many years.

Here's his explanation:

The video is a homage to Up, featuring the tennis-ball cane, the “Adventure Book,” and even a “Squirrel!” reaction from the family dog. Most of all, the feeling of loyalty between Grandpa and Grandma is evident throughout the entire video. Black makes a brief cameo in the end of the video, clad in a “Wilderness Explorer” uniform, like Russell from UP.