Google-search – How to add a video to the Google search result from the website

You tab until you get to it, then hit the enter key. I just tried it.

I like keyboard commands too, but this one is too much.

The same reason Facebook won't add a dislike button; things can really get ugly if we allow people to dislike and down vote.
Take for example if all the Coke people start down voting Pepsi websites, or fans of one football team start down voting rival team's online presence. This can potentially turn into a full blown riot. Antagonizing is not the way to build a positive environment.

Plus, if you really don't like any of the results on the website, you can hit the back button and in some cases Google allows you to hide the website the next time you search for similar stuff again (as long as you are logged into Google).