I don't think God told them to dub the sound of a call to prayer inside a mosque onto an outdoor video. They then distort the beautiful call to pray to God and say it was given atop a tank by the mujahideen in Syria. I don't need great piety to know that God does not approve of lies, but they do this in the name of God.

The sound is totally fake like a strawberry growing on seaweed on a rock. Notice the echoe because the call was actually given inside a large mosque.

Another surprising element of this fake video is the way it has been propagated online. The original youtube channel (photo 1) which featured the fake shows the video with 12177 views and 208 likes, no dislikes. It is not a false channel which was just created, it contains 363 mostly Syrian militia videos. This could mean two things. Firstly, there are 208 incredibly stupid people watching this video. Secondly, someone is somehow altering the statistics. A third likely possibility could mean that there are many stupid people watching the video, but less than 208 if the statistics have been altered to some lesser extent only. One way in which statistics can be influenced is by setting up false multiple accounts and using them for self-boostage, which is the most likely reason for the anomalous youtube Syria militia statistics.

Photo 2 shows the same video uploaded by another youtube channel (after the first) and it is just as anomalous with 363 views, 33 likes, no dislikes.