I'd have to agree with Kholdstare... I mean sure there would be exceptions but majority of MADs out there value the "match the beats of the music" thing which IMO is usually better than trying to match the lyrics. Take this for example:
It's a pretty simple video really yet it's very good since the scenes not only make sense but also match the beats of the music.
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Homura: Die monster! You don't belong in this world!
Kyubey: It was not by my hand that I am once again given flesh. I was called here by humans who wish to pay me tribute.
Homura: Tribute? You steal girls' souls, and make them your slaves!
Kyubey: Perhaps the same could be said of all religions.
Homura: Your words are as empty as your soul! Lolis ill-needs a savior such as you!
Kyubey: What is a loli? A miserable little pile of moe! But enough talk...have at you!