Some help on baking

New to the forum

I tried doing what happened in this video. V
https://www.youtube.com/watch?v=GnhsljhPnCo

But at 2:08, it ended up doing this V
https://www.youtube.com/watch?v=2Nc7xD7zn70
(Hope it’s uploaded)

If it’s not uploaded by the time this is up on the forum, What happens is once it’s baked it ends up turning into a black blob.