How and why do different genres use performance and lipsync?

How and why do different genres use performance and lipsync in music videos? What are the connotations and aims of the lipsync?

Within these three examples, the only one to promote their live aspect of their band is Iron Maiden. This is because their video is of a concert, and so allowing their audience to see that if they were to attend a concert of theirs, this is what they would get. Whereas the other two are simply a lip-sync and with walking etc, and so not promoting the live aspect of their music as much as they could. On the other hand, they do use all members within the music video which does allow the audience to see who all will be at a live show. As the Iron Maiden video is the only to show a genuine performance, their video allows them to connect with their audience better than the other two. Out of the three, Iron Maiden and PVRIS are the only ones to show a sense of authenticity as they both show a normalised situation with Iron Maiden in a concert and PVRIS walking and in a room performing to themselves. The sense of authenticity allows the audience to see what kind of thing they should expect in a live show. PVRIS emphasise this by having a little dancing and pronounced singing, giving the sense of reality of what it's like to perform on a stage. On the other hand, the Harry Styles music video is not authentic at all as he is seen to float through the sky which takes away from the normality. The PVRIS music video suits the genre (alternative rock) as it is dark with menacing looks from the two men (Alex and Brian) as they handle bats, the use of Lynn dancing in the dark room, however, links more to the live shows as they are more free to move around with no constricted movements. The Iron Maiden music video links to the genre (metal) as there is a lot of close ups of guitar which is a huge aspect of metal music. The costume also links to the genre as they are grungy. The Harry Styles video suits the genre (pop) by being simple yet complicated at the same time. Most pop videos are known to have some aspect of abnormality in them, the Harry Styles video being the floating in the sky. As for illustrating meaning in a song, the Iron Maiden as a whole is being done with lip sync and so there is not specific part that is emphasised. The PVRIS music video has a lot of lip sync, as does the Harry Styles video (not as much as the Iron Maiden video), which once again lacks emphasis on a certain part of the video.