[petepete]

YouTube really should be detecting and pushing them to the bottom of search results. Downvoting doesn't appear to have much of an effect.

[jimcsharp]

I believe likes and dislikes on Youtube both count as "interaction" as far as rankings are concerned.

[Cthulhu_]

Won't matter much in this case as it's heavily linked to by all kinds of news outlets.

[thesmok]

No it shouldn't. Sometimes videos like this one are a source of unique information.