Interactive music video

I have 24 videos of the same song. But each video is of a different musical instrument. I want to sync the music to each video to the finished song. Once the music starts, all of the video will begin to play, in sync with the main track. Now, I want users to be able to touch each video, one at a time while playing, to take up the full screen. Then to return it to its’ original size, touch it again. All the while, the music never stop. For example: The video is playing. Some videos show instructments being play while others in videos wait for their sole. So the bass guitar player begins to play, so the viewer touches screen (or click the mouse) on that video. Then the video with the bass player zooms to a full screen. , and it’ll take up the entire screen. Touch it again, then it return to the original size where you can see all 24 videos again. This job was posted from a mobile device, so please pardon any typos or any missing details.