He may have a little trouble with so many knowing his name, but he's Dave Hanson, to whom nothing is impossible.
He might've had a bit of trouble being so popular because of his Youtube channel, but nothing was impossible for Dave. 
mnli hypothesis: He might've had a bit of trouble being so popular because of his Youtube channel, but nothing was impossible for Dave.  premise: He may have a little trouble with so many knowing his name, but he's Dave Hanson, to whom nothing is impossible.