What % of the world production of soy actually goes to feed livestock?

So i was watching this YouTube video and a guy stated something I never heard before. According to him, the argument of deforestation being link to meat consumption because we deforest to plant soy is simply not true. He explained that 100% of the soy production is aimed at human consumption. However, after we extract what we need from the plant, the leftovers are refined and transformed into food for livestock. So claiming we plant soy for animals is like ordering a pizza, eating it, throwing the crust to your dog then claiming the pizza was produced for him because he ate the leftovers.

So…how true is it? Does anyone have some sources to check that? Anywhere I could get unbiased info about it?

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