Eyfoi, you probably aren't going to like this but you are unlikely to get a good answer to your question because you are asking the wrong question. It's one I asked many times too, so you're not alone in that. Eventually you realize that the important point is the cycle of push and drift, rise and fall in the body. When that starts to match the music, you stop thinking about the timing of the feet at all. Because that's the case, few who really do the dance well will be in a position to answer a question about the timing of the feet compared to the musical beats - because it's simply not important, it's a resulting charactertistic not a driving one. Yes, you could analyze their performance and figure out what their foot timing is, but it's not a route to learning to dance like them.