Complex sentence: In 1966, The Beatles shot two promotional videos for their two songs called "Paperback Writer" and "Rain" in the gardens--many of the shots being in the "exedra" and the conservatory among the camellias.
Split into simpler sentences: In 1966, The Beatles shot two promotional videos for two songs in the gardens; "Paperback Writer" and "Rain". Much of the filming was in the "exedra" and the conservatory among the camellias.