Jonas Brothers Tai Chi how is that melody called 1st check that video?

The melody you're referring to in the Jonas brothers' "Tai Chi" is likely called "Tai Chi" itself, as it is the title track from their album. The song features a catchy and upbeat tune that embodies themes of balance and mindfulness. For more specific details about the melody or its background, you may want to check the official music video or listen to the song directly.