I feel like the like-dislike button needs to be expanded instead to encompass various the nuances on why you might like or dislike a video.

Something I liked could be as trivial as an enjoyment of said content or a dislike because of it's presentation, or liking content that was presented in poor tastes yet recognizing it's comedic value.

That's not to say I don't recognize that the like-dislike ratio can also be gamed however.