IM Valeri Lilov's video deals with the move 4...Nf6 in the Scotch Game. He presents essential plans in both Mieses Variation (5.Nxc6) and the Scotch Four-Knights Variation (5.Nc3). The conclusion is that 4...Nf6 is a flexible continuation, aiming for a quick development of pieces and chances for both sides.
Below we have summarized the variations that IM Lilov shows in his video. Play through variations, add your own moves and use the assistance of the engine to help you analyse the strategically complex positions of this opening line.