This is a parody of SNL/The Lonely Island song “I’m On A Boat”.
Jarrett surprised his brother and the entire wedding party by making this song/video with all of the groomsmen. They shot this video at Strictly Formals Tux shop in Harrisburg, PA.
If you live under a rock and have never seen the “I’m On A Boat” video, this will not make much sense. Even if you have seen that video, this still may not make much sense. Here is the link to “I’m On A Boat”