The author of this video used different science experiments to create stunning visuals made by the sound itself.
It's almost mid-December so, as usual, Youtube made a recap video of the year featuring some more or less important guest stars.
Can you spot all the references? Also, what do you think of 2014, is it a better year than 2013?
'United States of Pop 2014' gathers the 25 best pop songs of this year in a cleverly edited video.
This is BBC's cover of The Beach Boys' 'God Only Knows', starring 29 of the biggest names in the music industry.
Eleanor Bartsch performs Bach on the violin for 44 and 45 year old Kelly and Viola who live at the Circus World Museum in Wisconsin. Watch their sweet reaction.
The original interview video that went viral few days ago.
And the music video with Eminem and Dr Dre