Complex sentence: These two scenes would initially be shot in Istanbul, but were moved to Scotland; the speed-boats could not run fast enough due to the many waves in the sea, and a rented boat filled with cameras ended up sinking in the Bosphorus.
Split into simpler sentences: These two scenes would initially be shot in Istanbul but were moved to Scotland. The speed-boats could not run fast enough due to the many waves in the sea and a rented boat filled with cameras ended up sinking in the Bosphorus.