Oh, thank you.
At that point I can tell you, that there are sometimes five layers in number. And that results while playback while editing in a “Single Frame pro Second-Show”.
Also in use is Chroma, and and and…
And yes keyframe-type is “smooth”, and in some parts “one” move is split into two. The second part starts and the end of part one…
But you can also use several points in one part.
The trick is, if you want so, to rebuild a curve with straight lines, like a octagon, or maybe with 16 edges. The more edges, straight lines, the more “curvy”.
And it is not a big work…, let’s say, several points for X/Y in one part and you rebuild an ‘Eight’, or so.
Journey-01.mlt (7.6 KB)
I do not know, if you can simply use that project…
And, no, it do not “draws” an 'Eight"… 
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…to the music:
I simply found it underlines, what I want to say within that video.
Unfortunately, it does not always depend on the taste. (To me it could have been more a Trance like piece…
)
Overall I think it is a good piece of music, for free and commercial usable.