Video projections set the scene for Shakespeare’s magical forest with Gustavo Dudamel leading Mendelssohn’s whimsical incidental music from A Midsummer Night’s Dream. Dudamel has called Gabriela Ortiz “one of the most important composers in the world” for her distinct use of rhythm and harmonic colors. Alisa Weilerstein performs the world premiere of the Mexican composer’s new Cello Concerto.