Just click HERE to go to Youtube and click on the "Vote for This" button on the bottom left corner.
And viola, you're done! You can vote everyday until November 27th, when Samsung will judge the videos with the most votes. You can take a look at how the video looks like below, if you are having trouble finding it.
I would really appreciate it if you can spare a second to vote for my video! Fingers crossed I will be seeing you in Sochi!