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That's not a good test subject. Suggest you start with something that is not already compressed.
As David said - find a more realworld test case. Apple's trailers are by all rights QT files, meaning that they will not necessarily be transcoded at the MPEG stream level, but instead fully re-compressed from the expanded pixel buffer - you may not see artifacts, but they are there nonetheless and will influence the quality of subsequent encodings, even more so on something as colorful and high contrast as this particular trailer... Also it seems you have made a moosh of your framerates. I'm not sure about the concrete example, but most Apple trailers are 24p native.
I tried to test with different settings and I found out that the cause of the problem is the frame rate. All my converted videos even on different selected formats yields the same problem. I tried other videos not from Apple.com and set it to MPEG-2 format but the same problem happens.