In my eyes, sampling anything is fair game as long as you do not harm anyone else. From what I take from it, the first video clearly liked the sound of the Azan, so they used it on their track. Even though Muslim prayer is very sacred, it is also a very interesting sound.
The second video is a little different. He doesn’t look as though he deliberately wants to offend anyone, but it’s obviously offensive to mock anyone. They probably don’t even understand what they are doing when they are dancing in those positions.
I feel like artistic expression can be used to take things very far and often art offends somebody in society, no matter what it is. Some Christian art is considered the ‘best’ out there, but i’m sure that a lot of offends people of other religions and cultures. To portray God as a white male with long brown hair and a beard straight up offends me!!!!! Who knows what he really looks like, that was just someone’s artistic expression that just caught on.