No, they found the original reels for the missing track, so it has been remastered to 4k widescreen. The whole alternate version with the song is in the special features on Disney Plus

They found the original cut and added it back in a couple years back. You can find the full 4k release in the special features on Disney Plus

Nope. This guy is the real deal. Nothing he does is large scale or unbelievable. If you turn on captions he walks you through what his thought process is/what he is doing. Very enjoyable.