Final answer:
Al-Qaeda and ISIL produce nasheed videos to control the messages of their movements.
Step-by-step explanation:
The best choice that explains why al-Qaeda and ISIL produce nasheed videos is that they can control messages of the movements. Nasheed videos serve as a powerful tool for these extremist groups to propagate their ideologies, recruit followers, and control the narrative. By producing nasheed videos, they manipulate the narrative and influence the perception of the movements by controlling the messages conveyed through the songs and visuals.
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