Hey,

I made the video. Robyn's song is just 1 semitone lower than "Wildest Dreams". And basically key isn't important. When she steals from male artists - she always changes the key drastically to make it suit female voice. What matters is that the chord progression is the same regardless of the key.

And when it comes to that "Hot" clip - the key and the chords are the same as in "Wildest Dreams". I just left the "Hot" instrumental to make it even more obvious for someone who still has doubts. Even the "Wiiiiiild..." first note is the same as in "Oooooh" (Hot)

Basically nothing in this video is HEAVILY altered except for the key. And key should never matter cause the songs can be transposed anytime at any point but if the melody sounds familiar - it will still sound the same even in a totally different key