I expect Kylie pays for the videos herself now. Even in the days of the big record deals, the cost of the video would have to come from the profits. I’m not sure about Kylie’s deals but some or all of the cost would have been claimed back from her.
The production cost of music videos (as well as the cost of promo for the single releases, as most singles made a loss due to 2 in 1 and 3 in 1 purchasing deals with the shops) was/is charged against the album income. All of that marketing spend is recoupable before any album royalties are paid out to the performers (that's why so many people started getting themselves producer and exec credits).
Remember all those acts who filmed moderate to big budget videos back in the 90s/early 2000s? Very few of them were able to say "no, we think that's too much money to spend on a video". And if they did, the label would threaten to pull the record anyway.
Kylie's likely on a 50/50 agreement with BMG. She fronts half the cost, but with that comes equal say in decisions and equal split of the profit income from her music activities, instead of the traditional classic label deal, we decide everything, we spend what we want, then recoup from you before you get to see anything.