If a level 1 difficulty was the linking paper clip on dollar bill and a level 10 difficulty is a center deal then I think that most magicians would say that this trick is at least a level 5. Some magicians would argue that the moves required are more difficult than that.
There are a couple tricks he recommends for instagram that are as difficult as a 1. These tricks are awesome, but he does not recommend performing any of these for a live audience.