People love making issues of such small things nowadays. Where were these people when Justin Timberlake were rocking those cornrows during his N*SYNC days or when Nicole Scherzinger and her backup dancers doing the "Jai Ho" video?
For me personally, I see this as a cultural appreciation as in people celebrating other people's culture without making mockery, misinterpreting it or over-sexualizing it. Videos like "Hymn", "Jai Ho", "Bad Girls" (M.I.A.) & "Princess of China" are all beautiful visually and well done (I watched "Bounce" once and I forgot how it looked like, so...). Tbh, from what I've seen I find that the people who find 'cultural appropriation' offensive is actually Westerners who are actually not a part of the culture being appropriated itself. Weird, right? Most people I know who belong to that culture themselves actually find these videos beautiful and is a good way to promote their culture.
The only music video using Asian culture that I find uncomfortable to watch is actually "Lean On". Not because of the 'cultural appropriation' issue, but I just find it's inappropriate for MO gyrating & dancing awkwardly in her underwears in front of those Indian women. Weird enough, the video has gained 1billion views on YouTube and based on the comments & the number of dislikes, I don't think people have problem with it. Well, maybe it's just me.
As for the Iggy vs. Bey comparisoon, well, it's a trend to hate Iggy nowadays so people will always find something 'bad' about her while Beyonce is seen as the queen of the world, so yeah.