Great video series on the Rossolimo against 4. Bc6. What do you recommend if white plays 4. 0-0 instead?
IM Christof Sielecki in his book Keep it simple 1.e4 recommended 4. 0-0 and after 4...Bg7 he recommends 5. Re1.
I have been getting this variation over the board much more frequently than 4. Bc6 against 1900+ players and I am not sure what to do with black.