"The Power Within" in SpongeBob SquarePants is an inspirational, somewhat mysterious video that SpongeBob shows to the Flying Dutchman in the episode "Ghost Host." The video is described by SpongeBob as "A Journey to Self- Awareness." It features a series of symbolic and ritualistic images including hooded figures rollerblading while chanting "The power within," an amulet, and a figure multiplying into multicolored versions of himself while continuing the chant. The video ends with the figure picking up sand and proclaiming "The power within," symbolizing a form of spiritual or personal enlightenment. This video only appears once in the entire series and carries themes of inner strength and self-discovery.

The episode "Ghost Host" (season 4) revolves around SpongeBob interacting with the Flying Dutchman, and this video is part of that storyline.

So, "The Power Within" is essentially a symbolic, inspirational video in SpongeBob that represents self-awareness and inner strength.